Fix custom options behaviour

28 files changed, 2540 insertions, 1367 deletions

diff --git a/src/AddressBook/AddressBookProtos.cs b/src/AddressBook/AddressBookProtos.cs
index 0f5d743d..8caf0f64 100644
--- a/src/AddressBook/AddressBookProtos.cs
+++ b/src/AddressBook/AddressBookProtos.cs
@@ -8,44 +8,62 @@ namespace Google.ProtocolBuffers.Examples.AddressBook {
   
   public static partial class AddressBookProtos {
   
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_tutorial_Person__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Builder> internal__static_tutorial_Person__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_tutorial_Person_PhoneNumber__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber.Builder> internal__static_tutorial_Person_PhoneNumber__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_tutorial_AddressBook__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook, global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook.Builder> internal__static_tutorial_AddressBook__FieldAccessorTable;
+    #endregion
     #region Descriptor
     public static pbd::FileDescriptor Descriptor {
       get { return descriptor; }
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "Chp0dXRvcmlhbC9hZGRyZXNzYm9vay5wcm90bxIIdHV0b3JpYWwaJGdvb2ds" + 
-        "ZS9wcm90b2J1Zi9jc2hhcnBfb3B0aW9ucy5wcm90byLaAQoGUGVyc29uEgwK" + 
-        "BG5hbWUYASACKAkSCgoCaWQYAiACKAUSDQoFZW1haWwYAyABKAkSKwoFcGhv" + 
-        "bmUYBCADKAsyHC50dXRvcmlhbC5QZXJzb24uUGhvbmVOdW1iZXIaTQoLUGhv" + 
-        "bmVOdW1iZXISDgoGbnVtYmVyGAEgAigJEi4KBHR5cGUYAiABKA4yGi50dXRv" + 
-        "cmlhbC5QZXJzb24uUGhvbmVUeXBlOgRIT01FIisKCVBob25lVHlwZRIKCgZN" + 
-        "T0JJTEUQABIICgRIT01FEAESCAoEV09SSxACIi8KC0FkZHJlc3NCb29rEiAK" + 
-        "BnBlcnNvbhgBIAMoCzIQLnR1dG9yaWFsLlBlcnNvbkJFSAHCPkAKK0dvb2ds" + 
-        "ZS5Qcm90b2NvbEJ1ZmZlcnMuRXhhbXBsZXMuQWRkcmVzc0Jvb2sSEUFkZHJl" + 
-        "c3NCb29rUHJvdG9z"),
-        new pbd::FileDescriptor[] {
+    private static pbd::FileDescriptor descriptor;
+    
+    static AddressBookProtos() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "Chp0dXRvcmlhbC9hZGRyZXNzYm9vay5wcm90bxIIdHV0b3JpYWwaJGdvb2ds" + 
+          "ZS9wcm90b2J1Zi9jc2hhcnBfb3B0aW9ucy5wcm90byLaAQoGUGVyc29uEgwK" + 
+          "BG5hbWUYASACKAkSCgoCaWQYAiACKAUSDQoFZW1haWwYAyABKAkSKwoFcGhv" + 
+          "bmUYBCADKAsyHC50dXRvcmlhbC5QZXJzb24uUGhvbmVOdW1iZXIaTQoLUGhv" + 
+          "bmVOdW1iZXISDgoGbnVtYmVyGAEgAigJEi4KBHR5cGUYAiABKA4yGi50dXRv" + 
+          "cmlhbC5QZXJzb24uUGhvbmVUeXBlOgRIT01FIisKCVBob25lVHlwZRIKCgZN" + 
+          "T0JJTEUQABIICgRIT01FEAESCAoEV09SSxACIi8KC0FkZHJlc3NCb29rEiAK" + 
+          "BnBlcnNvbhgBIAMoCzIQLnR1dG9yaWFsLlBlcnNvbkJFSAHCPkAKK0dvb2ds" + 
+          "ZS5Qcm90b2NvbEJ1ZmZlcnMuRXhhbXBsZXMuQWRkcmVzc0Jvb2sSEUFkZHJl" + 
+          "c3NCb29rUHJvdG9z");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_tutorial_Person__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_tutorial_Person__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Builder>(internal__static_tutorial_Person__Descriptor,
+                new string[] { "Name", "Id", "Email", "Phone", });
+        internal__static_tutorial_Person_PhoneNumber__Descriptor = internal__static_tutorial_Person__Descriptor.NestedTypes[0];
+        internal__static_tutorial_Person_PhoneNumber__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber.Builder>(internal__static_tutorial_Person_PhoneNumber__Descriptor,
+                new string[] { "Number", "Type", });
+        internal__static_tutorial_AddressBook__Descriptor = Descriptor.MessageTypes[1];
+        internal__static_tutorial_AddressBook__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook, global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook.Builder>(internal__static_tutorial_AddressBook__Descriptor,
+                new string[] { "Person", });
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
           global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
-        });
+          }, assigner);
+    }
     #endregion
     
-    #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_tutorial_Person__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Builder> internal__static_tutorial_Person__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Builder>(internal__static_tutorial_Person__Descriptor,
-            new string[] { "Name", "Id", "Email", "Phone", });
-    internal static readonly pbd::MessageDescriptor internal__static_tutorial_Person_PhoneNumber__Descriptor
-        = internal__static_tutorial_Person__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber.Builder> internal__static_tutorial_Person_PhoneNumber__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber, global::Google.ProtocolBuffers.Examples.AddressBook.Person.Types.PhoneNumber.Builder>(internal__static_tutorial_Person_PhoneNumber__Descriptor,
-            new string[] { "Number", "Type", });
-    internal static readonly pbd::MessageDescriptor internal__static_tutorial_AddressBook__Descriptor
-        = Descriptor.MessageTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook, global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook.Builder> internal__static_tutorial_AddressBook__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook, global::Google.ProtocolBuffers.Examples.AddressBook.AddressBook.Builder>(internal__static_tutorial_AddressBook__Descriptor,
-            new string[] { "Person", });
-    #endregion
   }
   #region Messages
   public sealed partial class Person : pb::GeneratedMessage<Person, Person.Builder> {
@@ -338,6 +356,9 @@ namespace Google.ProtocolBuffers.Examples.AddressBook {
             return this;
           }
         }
+        static PhoneNumber() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.Examples.AddressBook.AddressBookProtos.Descriptor;
+        }
       }
       
     }
@@ -685,6 +706,9 @@ namespace Google.ProtocolBuffers.Examples.AddressBook {
         return this;
       }
     }
+    static Person() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.Examples.AddressBook.AddressBookProtos.Descriptor;
+    }
   }
   
   public sealed partial class AddressBook : pb::GeneratedMessage<AddressBook, AddressBook.Builder> {
@@ -924,6 +948,9 @@ namespace Google.ProtocolBuffers.Examples.AddressBook {
         return this;
       }
     }
+    static AddressBook() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.Examples.AddressBook.AddressBookProtos.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtoGen/EnumGenerator.cs b/src/ProtoGen/EnumGenerator.cs
index aaed53c5..65eeb7d3 100644
--- a/src/ProtoGen/EnumGenerator.cs
+++ b/src/ProtoGen/EnumGenerator.cs
@@ -5,6 +5,7 @@ namespace Google.ProtocolBuffers.ProtoGen {
     internal EnumGenerator(EnumDescriptor descriptor) : base(descriptor) {
     }
 
+    // TODO(jonskeet): Write out enum descriptors? Can be retrieved from file...
     public void Generate(TextGenerator writer) {
       writer.WriteLine("{0} enum {1} {{", ClassAccessLevel, Descriptor.Name);
       writer.Indent();
diff --git a/src/ProtoGen/ExtensionGenerator.cs b/src/ProtoGen/ExtensionGenerator.cs
index c3412fe9..6b44ed73 100644
--- a/src/ProtoGen/ExtensionGenerator.cs
+++ b/src/ProtoGen/ExtensionGenerator.cs
@@ -1,17 +1,18 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
 using Google.ProtocolBuffers.Descriptors;
 
 namespace Google.ProtocolBuffers.ProtoGen {
   internal class ExtensionGenerator : SourceGeneratorBase<FieldDescriptor>, ISourceGenerator {
-    internal ExtensionGenerator(FieldDescriptor descriptor) : base(descriptor) {
-    }
 
-    public void Generate(TextGenerator writer) {
-      string name = Descriptor.CSharpOptions.PropertyName;
+    private readonly string scope;
+    private readonly string type;
+    private readonly string name;
 
-      string type;
+    internal ExtensionGenerator(FieldDescriptor descriptor) : base(descriptor) {
+      if (Descriptor.ExtensionScope != null) {
+        scope = GetClassName(Descriptor.ExtensionScope);
+      } else {
+        scope = DescriptorUtil.GetFullUmbrellaClassName(Descriptor.File);
+      }
       switch (Descriptor.MappedType) {
         case MappedType.Message:
           type = GetClassName(Descriptor.MessageType);
@@ -23,16 +24,28 @@ namespace Google.ProtocolBuffers.ProtoGen {
           type = DescriptorUtil.GetMappedTypeName(Descriptor.MappedType);
           break;
       }
+      name = Descriptor.CSharpOptions.PropertyName;
+    }
 
+    public void Generate(TextGenerator writer) {
       writer.WriteLine ("public const int {0} = {1};", GetFieldConstantName(Descriptor), Descriptor.FieldNumber);
       if (Descriptor.IsRepeated) {
-        writer.WriteLine("{0} static readonly", ClassAccessLevel);
-        writer.WriteLine("    pb::GeneratedExtensionBase<scg::IList<{0}>> {1} =", type, name);
-        writer.WriteLine("    pb::GeneratedRepeatExtension<{0}>.CreateInstance(Descriptor.Extensions[{1}]);", type, Descriptor.Index);
+        writer.WriteLine("{0} static pb::GeneratedExtensionBase<scg::IList<{1}>> {2};", ClassAccessLevel, type, name);
       } else {
-        writer.WriteLine("{0} static readonly pb::GeneratedExtensionBase<{1}> {2} =", ClassAccessLevel, type, name);
-        writer.WriteLine("    pb::GeneratedSingleExtension<{0}>.CreateInstance(Descriptor.Extensions[{1}]);", type, Descriptor.Index);
+        writer.WriteLine("{0} static pb::GeneratedExtensionBase<{1}> {2};", ClassAccessLevel, type, name);
       }
     }
+
+    internal void GenerateStaticVariableInitializers(TextGenerator writer) {
+      if (Descriptor.IsRepeated) {
+        writer.WriteLine("{0}.{1} = pb::GeneratedRepeatExtension<{2}>.CreateInstance({0}.Descriptor.Extensions[{3}]);", scope, name, type, Descriptor.Index);
+      } else {
+        writer.WriteLine("{0}.{1} = pb::GeneratedSingleExtension<{2}>.CreateInstance({0}.Descriptor.Extensions[{3}]);", scope, name, type, Descriptor.Index);
+      }
+    }
+
+    internal void GenerateExtensionRegistrationCode(TextGenerator writer) {
+      writer.WriteLine("registry.Add({0}.{1});", scope, name);
+    }
   }
 }
diff --git a/src/ProtoGen/MessageGenerator.cs b/src/ProtoGen/MessageGenerator.cs
index 4b983003..53859231 100644
--- a/src/ProtoGen/MessageGenerator.cs
+++ b/src/ProtoGen/MessageGenerator.cs
@@ -39,25 +39,42 @@ namespace Google.ProtocolBuffers.ProtoGen {
 
       // The descriptor for this type.
       string access = Descriptor.File.CSharpOptions.NestClasses ? "private" : "internal";
-      writer.WriteLine("{0} static readonly pbd::MessageDescriptor internal__{1}__Descriptor", access, identifier);
+      writer.WriteLine("{0} static pbd::MessageDescriptor internal__{1}__Descriptor;", access, identifier);
+      writer.WriteLine("{0} static pb::FieldAccess.FieldAccessorTable<{1}, {1}.Builder> internal__{2}__FieldAccessorTable;",
+          access, FullClassName, identifier);
+
+      // Generate static members for all nested types.
+      foreach (MessageDescriptor nestedMessage in Descriptor.NestedTypes) {
+        new MessageGenerator(nestedMessage).GenerateStaticVariables(writer);
+      }
+    }
+
+    internal void GenerateStaticVariableInitializers(TextGenerator writer) {
+      string identifier = GetUniqueFileScopeIdentifier(Descriptor);
+
+      writer.Write("internal__{0}__Descriptor = ", identifier);
       if (Descriptor.ContainingType == null) {
-        writer.WriteLine("    = Descriptor.MessageTypes[{0}];", Descriptor.Index);
+        writer.WriteLine("Descriptor.MessageTypes[{0}];", Descriptor.Index);
       } else {
-        writer.WriteLine("    = internal__{0}__Descriptor.NestedTypes[{1}];", GetUniqueFileScopeIdentifier(Descriptor.ContainingType), Descriptor.Index);
+        writer.WriteLine("internal__{0}__Descriptor.NestedTypes[{1}];", GetUniqueFileScopeIdentifier(Descriptor.ContainingType), Descriptor.Index);
       }
-      writer.WriteLine("{0} static pb::FieldAccess.FieldAccessorTable<{1}, {1}.Builder> internal__{2}__FieldAccessorTable",
-          access, FullClassName, identifier);
-      writer.WriteLine("    = new pb::FieldAccess.FieldAccessorTable<{0}, {0}.Builder>(internal__{1}__Descriptor,",
-          FullClassName, identifier);
+
+      writer.WriteLine("internal__{0}__FieldAccessorTable = ", identifier);
+      writer.WriteLine("    new pb::FieldAccess.FieldAccessorTable<{1}, {1}.Builder>(internal__{0}__Descriptor,",
+          identifier, FullClassName);
       writer.Print("        new string[] { ");
       foreach (FieldDescriptor field in Descriptor.Fields) {
         writer.Write("\"{0}\", ", field.CSharpOptions.PropertyName);
       }
       writer.WriteLine("});");
 
-      // Generate static members for all nested types.
+      // Generate static member initializers for all nested types.
       foreach (MessageDescriptor nestedMessage in Descriptor.NestedTypes) {
-        new MessageGenerator(nestedMessage).GenerateStaticVariables(writer);
+        new MessageGenerator(nestedMessage).GenerateStaticVariableInitializers(writer);
+      }
+
+      foreach (FieldDescriptor extension in Descriptor.Extensions) {
+        new ExtensionGenerator(extension).GenerateStaticVariableInitializers(writer);
       }
     }
 
@@ -119,6 +136,17 @@ namespace Google.ProtocolBuffers.ProtoGen {
 
       GenerateParseFromMethods(writer);
       GenerateBuilder(writer);
+
+      // Force the static initialization code for the file to run, since it may
+      // initialize static variables declared in this class.
+      writer.WriteLine("static {0}() {{", ClassName);
+      // Note that the variable is needed just so we can access the property
+      writer.WriteLine("  pbd::FileDescriptor descriptor = {0}.Descriptor;", DescriptorUtil.GetFullUmbrellaClassName(Descriptor));
+      writer.WriteLine("}");
+
+      writer.Outdent();
+      writer.WriteLine("}");
+      writer.WriteLine();
     }
 
     private void GenerateMessageSerializationMethods(TextGenerator writer) {
@@ -297,9 +325,6 @@ namespace Google.ProtocolBuffers.ProtoGen {
       }
       writer.Outdent();
       writer.WriteLine("}");
-      writer.Outdent();
-      writer.WriteLine("}");
-      writer.WriteLine();
     }
 
     private void GenerateCommonBuilderMethods(TextGenerator writer) {
@@ -472,5 +497,14 @@ namespace Google.ProtocolBuffers.ProtoGen {
       writer.WriteLine("}");
       writer.WriteLine();
     }
+
+    internal void GenerateExtensionRegistrationCode(TextGenerator writer) {
+      foreach (FieldDescriptor extension in Descriptor.Extensions) {
+        new ExtensionGenerator(extension).GenerateExtensionRegistrationCode(writer);
+      }
+      foreach (MessageDescriptor nestedMessage in Descriptor.NestedTypes) {
+        new MessageGenerator(nestedMessage).GenerateExtensionRegistrationCode(writer);
+      }
+    }
   }
 }
diff --git a/src/ProtoGen/SourceFileGenerator.cs b/src/ProtoGen/SourceFileGenerator.cs
index 61321753..b5bd5efb 100644
--- a/src/ProtoGen/SourceFileGenerator.cs
+++ b/src/ProtoGen/SourceFileGenerator.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Text;
-using Google.ProtocolBuffers.Descriptors;
 
 namespace Google.ProtocolBuffers.ProtoGen {
   /// <summary>
diff --git a/src/ProtoGen/SourceGeneratorBase.cs b/src/ProtoGen/SourceGeneratorBase.cs
index dea9def2..1604f11c 100644
--- a/src/ProtoGen/SourceGeneratorBase.cs
+++ b/src/ProtoGen/SourceGeneratorBase.cs
@@ -31,7 +31,7 @@ namespace Google.ProtocolBuffers.ProtoGen {
     }
 
     internal static string GetFieldConstantName(FieldDescriptor field) {
-      return NameHelpers.UnderscoresToPascalCase(GetFieldName(field)) + "FieldNumber";
+      return field.CSharpOptions.PropertyName + "FieldNumber";
     }
 
     private static string ToCSharpName(string name, FileDescriptor file) {
diff --git a/src/ProtoGen/UmbrellaClassGenerator.cs b/src/ProtoGen/UmbrellaClassGenerator.cs
index 938507b5..732b6f8d 100644
--- a/src/ProtoGen/UmbrellaClassGenerator.cs
+++ b/src/ProtoGen/UmbrellaClassGenerator.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Collections;
+using System.Collections.Generic;
 using Google.ProtocolBuffers.DescriptorProtos;
 using Google.ProtocolBuffers.Descriptors;
 
@@ -13,19 +15,49 @@ namespace Google.ProtocolBuffers.ProtoGen {
       : base(descriptor) {
     }
 
+    // Recursively searches the given message to see if it contains any extensions.
+    private static bool UsesExtensions(IMessage message) {
+      // We conservatively assume that unknown fields are extensions.
+      if (message.UnknownFields.FieldDictionary.Count > 0) {
+        return true;
+      }
+
+      foreach (KeyValuePair<FieldDescriptor, object> keyValue in message.AllFields) {
+        FieldDescriptor field = keyValue.Key;
+        if (field.IsExtension) {
+          return true;
+        }
+        if (field.MappedType == MappedType.Message) {
+          if (field.IsRepeated) {
+            foreach (IMessage subMessage in (IEnumerable)keyValue.Value) {
+              if (UsesExtensions(subMessage)) {
+                return true;
+              }
+            }
+          } else {
+            if (UsesExtensions((IMessage)keyValue.Value)) {
+              return true;
+            }
+          }
+        }
+      }
+      return false;
+    }
+
     public string UmbrellaClassName {
       get { throw new NotImplementedException(); }
     }
 
     public void Generate(TextGenerator writer) {
       WriteIntroduction(writer);
-      WriteDescriptor(writer);
+      WriteExtensionRegistration(writer);
       WriteChildren(writer, "Extensions", Descriptor.Extensions);
       writer.WriteLine("#region Static variables");
       foreach (MessageDescriptor message in Descriptor.MessageTypes) {
         new MessageGenerator(message).GenerateStaticVariables(writer);
       }
       writer.WriteLine("#endregion");
+      WriteDescriptor(writer);
       // The class declaration either gets closed before or after the children are written.
       if (!Descriptor.CSharpOptions.NestClasses) {
         writer.Outdent();
@@ -60,14 +92,32 @@ namespace Google.ProtocolBuffers.ProtoGen {
       writer.Indent();
     }
 
+    private void WriteExtensionRegistration(TextGenerator writer) {
+      writer.WriteLine("#region Extension registration");
+      writer.WriteLine("public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {");
+      writer.Indent();
+      foreach (FieldDescriptor extension in Descriptor.Extensions) {
+        new ExtensionGenerator(extension).GenerateExtensionRegistrationCode(writer);
+      }
+      foreach (MessageDescriptor message in Descriptor.MessageTypes) {
+        new MessageGenerator(message).GenerateExtensionRegistrationCode(writer);
+      }
+      writer.Outdent();
+      writer.WriteLine("}");
+      writer.WriteLine("#endregion");
+    }
+
     private void WriteDescriptor(TextGenerator writer) {
       writer.WriteLine("#region Descriptor");
 
       writer.WriteLine("public static pbd::FileDescriptor Descriptor {");
       writer.WriteLine("  get { return descriptor; }");
       writer.WriteLine("}");
-      writer.WriteLine("private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(");
-      writer.WriteLine("    global::System.Convert.FromBase64String(");
+      writer.WriteLine("private static pbd::FileDescriptor descriptor;");
+      writer.WriteLine();
+      writer.WriteLine("static {0}() {{", Descriptor.CSharpOptions.UmbrellaClassname);
+      writer.Indent();
+      writer.WriteLine("byte[] descriptorData = global::System.Convert.FromBase64String(");
       writer.Indent();
       writer.Indent();
 
@@ -79,15 +129,44 @@ namespace Google.ProtocolBuffers.ProtoGen {
         writer.WriteLine("\"{0}\" + ", base64.Substring(0, 60));
         base64 = base64.Substring(60);
       }
-      writer.WriteLine("\"{0}\"),", base64);
+      writer.WriteLine("\"{0}\");", base64);
+      writer.Outdent();
+      writer.Outdent();
+      writer.WriteLine("pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {");
+      writer.Indent();
+      writer.WriteLine("descriptor = root;");
+      foreach (MessageDescriptor message in Descriptor.MessageTypes) {
+        new MessageGenerator(message).GenerateStaticVariableInitializers(writer);
+      }
+      foreach (FieldDescriptor extension in Descriptor.Extensions) {
+        new ExtensionGenerator(extension).GenerateStaticVariableInitializers(writer);
+      }
 
-      writer.WriteLine("new pbd::FileDescriptor[] {");
-      foreach (FileDescriptor dependency in Descriptor.Dependencies) {
-        writer.WriteLine("  {0}.Descriptor, ", DescriptorUtil.GetFullUmbrellaClassName(dependency));
+      if (UsesExtensions(Descriptor.Proto)) {
+        // Must construct an ExtensionRegistry containing all possible extensions
+        // and return it.
+        writer.WriteLine("pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();");
+        writer.WriteLine("RegisterAllExtensions(registry);");
+        foreach (FileDescriptor dependency in Descriptor.Dependencies) {
+          writer.WriteLine("{0}.RegisterAllExtensions(registry);", DescriptorUtil.GetFullUmbrellaClassName(dependency));
+        }
+        writer.WriteLine("return registry;");
+      } else {
+        writer.WriteLine("return null;");
       }
-      writer.WriteLine("});");
       writer.Outdent();
+      writer.WriteLine("};");
+
+      // -----------------------------------------------------------------
+      // Invoke internalBuildGeneratedFileFrom() to build the file.
+      writer.WriteLine("pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,");
+      writer.WriteLine("    new pbd::FileDescriptor[] {");
+      foreach (FileDescriptor dependency in Descriptor.Dependencies) {
+        writer.WriteLine("    {0}.Descriptor, ", DescriptorUtil.GetFullUmbrellaClassName(dependency));
+      }
+      writer.WriteLine("    }, assigner);");
       writer.Outdent();
+      writer.WriteLine("}");
       writer.WriteLine("#endregion");
       writer.WriteLine();
     }
diff --git a/src/ProtocolBuffers.Test/CodedInputStreamTest.cs b/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
index 2ad8c45b..8944dbf0 100644
--- a/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
+++ b/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
@@ -397,7 +397,7 @@ namespace Google.ProtocolBuffers {
       try {
         input.ReadRawByte();
         Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException e) {
+      } catch (InvalidProtocolBufferException) {
         // Success.
       }
 
@@ -407,7 +407,7 @@ namespace Google.ProtocolBuffers {
       try {
         input.ReadRawBytes(16);  // Hits limit again.
         Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException e) {
+      } catch (InvalidProtocolBufferException) {
         // Success.
       }
     }
diff --git a/src/ProtocolBuffers.Test/Descriptors/MessageDescriptorTest.cs b/src/ProtocolBuffers.Test/Descriptors/MessageDescriptorTest.cs
new file mode 100644
index 00000000..5b8abebd
--- /dev/null
+++ b/src/ProtocolBuffers.Test/Descriptors/MessageDescriptorTest.cs
@@ -0,0 +1,31 @@
+using NUnit.Framework;
+using Google.ProtocolBuffers.TestProtos;
+
+namespace Google.ProtocolBuffers.Descriptors {
+
+  [TestFixture]
+  public class MessageDescriptorTest {
+    [Test]
+    public void FindPropertyWithDefaultName() {
+      Assert.AreSame(OptionsMessage.Descriptor.FindFieldByNumber(OptionsMessage.NormalFieldNumber),
+          OptionsMessage.Descriptor.FindFieldByPropertyName("Normal"));
+    }
+
+    [Test]
+    public void FindPropertyWithAutoModifiedName() {
+      Assert.AreSame(OptionsMessage.Descriptor.FindFieldByNumber(OptionsMessage.OptionsMessage_FieldNumber),
+          OptionsMessage.Descriptor.FindFieldByPropertyName("OptionsMessage_"));
+    }
+
+    [Test]
+    public void FindPropertyWithCustomizedName() {
+      Assert.AreSame(OptionsMessage.Descriptor.FindFieldByNumber(OptionsMessage.CustomNameFieldNumber),
+          OptionsMessage.Descriptor.FindFieldByPropertyName("CustomName"));
+    }
+
+    [Test]
+    public void FindPropertyWithInvalidName() {
+      Assert.IsNull(OptionsMessage.Descriptor.FindFieldByPropertyName("Bogus"));
+    }
+  }
+}
diff --git a/src/ProtocolBuffers.Test/DescriptorsTest.cs b/src/ProtocolBuffers.Test/DescriptorsTest.cs
index 3921a6ee..913a919e 100644
--- a/src/ProtocolBuffers.Test/DescriptorsTest.cs
+++ b/src/ProtocolBuffers.Test/DescriptorsTest.cs
@@ -286,5 +286,41 @@ namespace Google.ProtocolBuffers {
         Assert.AreEqual(i, service.Methods[i].Index);
       }
     }
+
+    [Test]
+    public void CustomOptions() {
+      MessageDescriptor descriptor = TestMessageWithCustomOptions.Descriptor;
+      Assert.IsTrue(descriptor.Options.HasExtension(UnitTestCustomOptionsProtoFile.MessageOpt1));
+      Assert.AreEqual(-56, descriptor.Options.GetExtension(UnitTestCustomOptionsProtoFile.MessageOpt1));
+
+
+      FieldDescriptor field = descriptor.FindFieldByName("field1");
+      Assert.IsNotNull(field);
+
+      Assert.IsTrue(field.Options.HasExtension(UnitTestCustomOptionsProtoFile.FieldOpt1));
+      Assert.AreEqual(8765432109L, field.Options.GetExtension(UnitTestCustomOptionsProtoFile.FieldOpt1));
+
+      // TODO: Write out enum descriptors
+      /*
+      EnumDescriptor enumType = TestMessageWithCustomOptions.Types.
+        UnittestCustomOptions.TestMessageWithCustomOptions.AnEnum.getDescriptor();
+
+      Assert.IsTrue(
+        enumType.getOptions().hasExtension(UnittestCustomOptions.enumOpt1));
+      Assert.AreEqual(Integer.valueOf(-789),
+        enumType.getOptions().getExtension(UnittestCustomOptions.enumOpt1));
+        */
+
+      ServiceDescriptor service = TestServiceWithCustomOptions.Descriptor;
+
+      Assert.IsTrue(service.Options.HasExtension(UnitTestCustomOptionsProtoFile.ServiceOpt1));
+      Assert.AreEqual(-9876543210L, service.Options.GetExtension(UnitTestCustomOptionsProtoFile.ServiceOpt1));
+
+      MethodDescriptor method = service.FindMethodByName("Foo");
+      Assert.IsNotNull(method);
+
+      Assert.IsTrue(method.Options.HasExtension(UnitTestCustomOptionsProtoFile.MethodOpt1));
+      Assert.AreEqual(MethodOpt1.METHODOPT1_VAL2, method.Options.GetExtension(UnitTestCustomOptionsProtoFile.MethodOpt1));
+    }
   }
 }
diff --git a/src/ProtocolBuffers.Test/DynamicMessageTest.cs b/src/ProtocolBuffers.Test/DynamicMessageTest.cs
index 2f3fefa8..69e2e6b8 100644
--- a/src/ProtocolBuffers.Test/DynamicMessageTest.cs
+++ b/src/ProtocolBuffers.Test/DynamicMessageTest.cs
@@ -64,7 +64,7 @@ namespace Google.ProtocolBuffers {
       try {
         builder.Build();
         Assert.Fail("Should have thrown exception.");
-      } catch (InvalidOperationException e) {
+      } catch (InvalidOperationException) {
         // Success.
       }
     }
diff --git a/src/ProtocolBuffers.Test/GeneratedMessageTest.cs b/src/ProtocolBuffers.Test/GeneratedMessageTest.cs
index 1980bbc1..69c5ac37 100644
--- a/src/ProtocolBuffers.Test/GeneratedMessageTest.cs
+++ b/src/ProtocolBuffers.Test/GeneratedMessageTest.cs
@@ -97,7 +97,7 @@ namespace Google.ProtocolBuffers {
       try {
         builder.Build();
         Assert.Fail("Should have thrown exception.");
-      } catch (InvalidOperationException e) {
+      } catch (InvalidOperationException) {
         // Success.
       }
     }
diff --git a/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj b/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
index 2eb81e50..785ba893 100644
--- a/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
+++ b/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
@@ -53,6 +53,7 @@
     <Compile Include="Collections\PopsicleListTest.cs" />
     <Compile Include="CSharpOptionsTest.cs" />
     <Compile Include="DescriptorsTest.cs" />
+    <Compile Include="Descriptors\MessageDescriptorTest.cs" />
     <Compile Include="DynamicMessageTest.cs" />
     <Compile Include="GeneratedMessageTest.cs" />
     <Compile Include="MessageStreamIteratorTest.cs" />
@@ -63,6 +64,8 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ReflectionTester.cs" />
     <Compile Include="ServiceTest.cs" />
+    <Compile Include="TestProtos\UnitTestCSharpOptionsProtoFile.cs" />
+    <Compile Include="TestProtos\UnitTestCustomOptionsProtoFile.cs" />
     <Compile Include="TestProtos\UnitTestEmbedOptimizeForProtoFile.cs" />
     <Compile Include="TestProtos\UnitTestImportProtoFile.cs" />
     <Compile Include="TestProtos\UnitTestMessageSetProtoFile.cs" />
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestCSharpOptionsProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestCSharpOptionsProtoFile.cs
new file mode 100644
index 00000000..8441c1d3
--- /dev/null
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestCSharpOptionsProtoFile.cs
@@ -0,0 +1,246 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+
+using pb = global::Google.ProtocolBuffers;
+using pbc = global::Google.ProtocolBuffers.Collections;
+using pbd = global::Google.ProtocolBuffers.Descriptors;
+using scg = global::System.Collections.Generic;
+namespace Google.ProtocolBuffers.TestProtos {
+  
+  public static partial class UnitTestCSharpOptionsProtoFile {
+  
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_OptionsMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.OptionsMessage, global::Google.ProtocolBuffers.TestProtos.OptionsMessage.Builder> internal__static_protobuf_unittest_OptionsMessage__FieldAccessorTable;
+    #endregion
+    #region Descriptor
+    public static pbd::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestCSharpOptionsProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "Ci1nb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfY3NoYXJwX29wdGlvbnMucHJv" + 
+          "dG8SEXByb3RvYnVmX3VuaXR0ZXN0GiRnb29nbGUvcHJvdG9idWYvY3NoYXJw" + 
+          "X29wdGlvbnMucHJvdG8iXgoOT3B0aW9uc01lc3NhZ2USDgoGbm9ybWFsGAEg" + 
+          "ASgJEhcKD29wdGlvbnNfbWVzc2FnZRgCIAEoCRIjCgpjdXN0b21pemVkGAMg" + 
+          "ASgJQg/CPgwKCkN1c3RvbU5hbWVCRsI+QwohR29vZ2xlLlByb3RvY29sQnVm" + 
+          "ZmVycy5UZXN0UHJvdG9zEh5Vbml0VGVzdENTaGFycE9wdGlvbnNQcm90b0Zp" + 
+          "bGU=");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_OptionsMessage__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_OptionsMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.OptionsMessage, global::Google.ProtocolBuffers.TestProtos.OptionsMessage.Builder>(internal__static_protobuf_unittest_OptionsMessage__Descriptor,
+                new string[] { "Normal", "OptionsMessage_", "CustomName", });
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
+          global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
+          }, assigner);
+    }
+    #endregion
+    
+  }
+  #region Messages
+  public sealed partial class OptionsMessage : pb::GeneratedMessage<OptionsMessage, OptionsMessage.Builder> {
+    private static readonly OptionsMessage defaultInstance = new Builder().BuildPartial();
+    public static OptionsMessage DefaultInstance {
+      get { return defaultInstance; }
+    }
+    
+    public override OptionsMessage DefaultInstanceForType {
+      get { return defaultInstance; }
+    }
+    
+    protected override OptionsMessage ThisMessage {
+      get { return this; }
+    }
+    
+    public static pbd::MessageDescriptor Descriptor {
+      get { return global::Google.ProtocolBuffers.TestProtos.UnitTestCSharpOptionsProtoFile.internal__static_protobuf_unittest_OptionsMessage__Descriptor; }
+    }
+    
+    protected override pb::FieldAccess.FieldAccessorTable<OptionsMessage, OptionsMessage.Builder> InternalFieldAccessors {
+      get { return global::Google.ProtocolBuffers.TestProtos.UnitTestCSharpOptionsProtoFile.internal__static_protobuf_unittest_OptionsMessage__FieldAccessorTable; }
+    }
+    
+    public const int NormalFieldNumber = 1;
+    private bool hasNormal;
+    private string normal_ = "";
+    public bool HasNormal {
+      get { return hasNormal; }
+    }
+    public string Normal {
+      get { return normal_; }
+    }
+    
+    public const int OptionsMessage_FieldNumber = 2;
+    private bool hasOptionsMessage_;
+    private string optionsMessage_ = "";
+    public bool HasOptionsMessage_ {
+      get { return hasOptionsMessage_; }
+    }
+    public string OptionsMessage_ {
+      get { return optionsMessage_; }
+    }
+    
+    public const int CustomNameFieldNumber = 3;
+    private bool hasCustomName;
+    private string customized_ = "";
+    public bool HasCustomName {
+      get { return hasCustomName; }
+    }
+    public string CustomName {
+      get { return customized_; }
+    }
+    
+    public static OptionsMessage ParseFrom(pb::ByteString data) {
+      return ((Builder) CreateBuilder().MergeFrom(data)).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(pb::ByteString data, pb::ExtensionRegistry extensionRegistry) {
+      return ((Builder) CreateBuilder().MergeFrom(data, extensionRegistry)).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(byte[] data) {
+      return ((Builder) CreateBuilder().MergeFrom(data)).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(byte[] data, pb::ExtensionRegistry extensionRegistry) {
+      return ((Builder) CreateBuilder().MergeFrom(data, extensionRegistry)).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(global::System.IO.Stream input) {
+      return ((Builder) CreateBuilder().MergeFrom(input)).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(global::System.IO.Stream input, pb::ExtensionRegistry extensionRegistry) {
+      return ((Builder) CreateBuilder().MergeFrom(input, extensionRegistry)).BuildParsed();
+    }
+    public static OptionsMessage ParseDelimitedFrom(global::System.IO.Stream input) {
+      return CreateBuilder().MergeDelimitedFrom(input).BuildParsed();
+    }
+    public static OptionsMessage ParseDelimitedFrom(global::System.IO.Stream input, pb::ExtensionRegistry extensionRegistry) {
+      return CreateBuilder().MergeDelimitedFrom(input, extensionRegistry).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(pb::CodedInputStream input) {
+      return ((Builder) CreateBuilder().MergeFrom(input)).BuildParsed();
+    }
+    public static OptionsMessage ParseFrom(pb::CodedInputStream input, pb::ExtensionRegistry extensionRegistry) {
+      return ((Builder) CreateBuilder().MergeFrom(input, extensionRegistry)).BuildParsed();
+    }
+    public static Builder CreateBuilder() { return new Builder(); }
+    public override Builder ToBuilder() { return CreateBuilder(this); }
+    public override Builder CreateBuilderForType() { return new Builder(); }
+    public static Builder CreateBuilder(OptionsMessage prototype) {
+      return (Builder) new Builder().MergeFrom(prototype);
+    }
+    
+    public sealed partial class Builder : pb::GeneratedBuilder<OptionsMessage, Builder> {
+      protected override Builder ThisBuilder {
+        get { return this; }
+      }
+      public Builder() {}
+      
+      OptionsMessage result = new OptionsMessage();
+      
+      protected override OptionsMessage MessageBeingBuilt {
+        get { return result; }
+      }
+      
+      public override Builder Clear() {
+        result = new OptionsMessage();
+        return this;
+      }
+      
+      public override Builder Clone() {
+        return new Builder().MergeFrom(result);
+      }
+      
+      public override pbd::MessageDescriptor DescriptorForType {
+        get { return OptionsMessage.Descriptor; }
+      }
+      
+      public override OptionsMessage DefaultInstanceForType {
+        get { return OptionsMessage.DefaultInstance; }
+      }
+      
+      public override OptionsMessage BuildPartial() {
+        if (result == null) {
+          throw new global::System.InvalidOperationException("build() has already been called on this Builder");
+        }
+        OptionsMessage returnMe = result;
+        result = null;
+        return returnMe;
+      }
+      
+      
+      public bool HasNormal {
+        get { return result.HasNormal; }
+      }
+      public string Normal {
+        get { return result.Normal; }
+        set { SetNormal(value); }
+      }
+      public Builder SetNormal(string value) {
+        pb::ThrowHelper.ThrowIfNull(value, "value");
+        result.hasNormal = true;
+        result.normal_ = value;
+        return this;
+      }
+      public Builder ClearNormal() {
+        result.hasNormal = false;
+        result.normal_ = "";
+        return this;
+      }
+      
+      public bool HasOptionsMessage_ {
+        get { return result.HasOptionsMessage_; }
+      }
+      public string OptionsMessage_ {
+        get { return result.OptionsMessage_; }
+        set { SetOptionsMessage_(value); }
+      }
+      public Builder SetOptionsMessage_(string value) {
+        pb::ThrowHelper.ThrowIfNull(value, "value");
+        result.hasOptionsMessage_ = true;
+        result.optionsMessage_ = value;
+        return this;
+      }
+      public Builder ClearOptionsMessage_() {
+        result.hasOptionsMessage_ = false;
+        result.optionsMessage_ = "";
+        return this;
+      }
+      
+      public bool HasCustomName {
+        get { return result.HasCustomName; }
+      }
+      public string CustomName {
+        get { return result.CustomName; }
+        set { SetCustomName(value); }
+      }
+      public Builder SetCustomName(string value) {
+        pb::ThrowHelper.ThrowIfNull(value, "value");
+        result.hasCustomName = true;
+        result.customized_ = value;
+        return this;
+      }
+      public Builder ClearCustomName() {
+        result.hasCustomName = false;
+        result.customized_ = "";
+        return this;
+      }
+    }
+    static OptionsMessage() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCSharpOptionsProtoFile.Descriptor;
+    }
+  }
+  
+  #endregion
+  
+}
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestCustomOptionsProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestCustomOptionsProtoFile.cs
index b198d4f3..5b4f10a3 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestCustomOptionsProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestCustomOptionsProtoFile.cs
@@ -8,298 +8,365 @@ namespace Google.ProtocolBuffers.TestProtos {
   
   public static partial class UnitTestCustomOptionsProtoFile {
   
-    #region Descriptor
-    public static pbd::FileDescriptor Descriptor {
-      get { return descriptor; }
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FileOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.MessageOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FieldOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FieldOpt2);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.EnumOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ServiceOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.MethodOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.BoolOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Int32Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Int64Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Uint32Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Uint64Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sint32Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sint64Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Fixed32Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Fixed64Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sfixed32Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sfixed64Opt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FloatOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.DoubleOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.StringOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.BytesOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.EnumOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.MessageTypeOpt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Quux);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Corge);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Grault);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Garply);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt1);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt2);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt3);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt6);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.ComplexOpt4);
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "Ci1nb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfY3VzdG9tX29wdGlvbnMucHJv" + 
-        "dG8SEXByb3RvYnVmX3VuaXR0ZXN0GiRnb29nbGUvcHJvdG9idWYvY3NoYXJw" + 
-        "X29wdGlvbnMucHJvdG8aIGdvb2dsZS9wcm90b2J1Zi9kZXNjcmlwdG9yLnBy" + 
-        "b3RvIoYBChxUZXN0TWVzc2FnZVdpdGhDdXN0b21PcHRpb25zEh4KBmZpZWxk" + 
-        "MRgBIAEoCUIOCAHB4MMdLeF1CgIAAAAiNAoGQW5FbnVtEg8KC0FORU5VTV9W" + 
-        "QUwxEAESDwoLQU5FTlVNX1ZBTDIQAhoIxfbJHev8//86EAgA4OnCHcj/////" + 
-        "/////wEiGAoWQ3VzdG9tT3B0aW9uRm9vUmVxdWVzdCIZChdDdXN0b21PcHRp" + 
-        "b25Gb29SZXNwb25zZSJtChpEdW1teU1lc3NhZ2VDb250YWluaW5nRW51bSJP" + 
-        "CgxUZXN0RW51bVR5cGUSGgoWVEVTVF9PUFRJT05fRU5VTV9UWVBFMRAWEiMK" + 
-        "FlRFU1RfT1BUSU9OX0VOVU1fVFlQRTIQ6f//////////ASIhCh9EdW1teU1l" + 
-        "c3NhZ2VJbnZhbGlkQXNPcHRpb25UeXBlIooBChxDdXN0b21PcHRpb25NaW5J" + 
-        "bnRlZ2VyVmFsdWVzOmqZ1qgdAAAAAAAAAICtja8dAAAAgJHurx0AAAAAAAAA" + 
-        "AJ31rx0AAAAA+JewHf///////////wGAxLAd/////w/49bAdAICTsh0AsLyy" + 
-        "HYCAgICAgICAgAHoxrIdgICAgPj/////AdDesh0AIpEBChxDdXN0b21PcHRp" + 
-        "b25NYXhJbnRlZ2VyVmFsdWVzOnGZ1qgd/////////3+tja8d////f5Hurx3/" + 
-        "/////////531rx3/////+JewHf7//////////wGAxLAd/v///w/49bAd////" + 
-        "////////AYCTsh3/////D7C8sh3//////////3/oxrId/////wfQ3rIdASJu" + 
-        "ChdDdXN0b21PcHRpb25PdGhlclZhbHVlczpTiNmiHen//////////wGy2aId" + 
-        "C0hlbGxvAFdvcmxkqtyiHQ5IZWxsbywgIldvcmxkIuncoh37WYxCysDzP/Xf" + 
-        "ox3nh0VB6MayHZz//////////wEiNAocU2V0dGluZ1JlYWxzRnJvbVBvc2l0" + 
-        "aXZlSW50czoU6dyiHQAAAAAAQGNA9d+jHQAAQEEiNAocU2V0dGluZ1JlYWxz" + 
-        "RnJvbU5lZ2F0aXZlSW50czoU6dyiHQAAAAAAQGPA9d+jHQAAQMEiKwoSQ29t" + 
-        "cGxleE9wdGlvblR5cGUxEgsKA2ZvbxgBIAEoBSoICGQQgICAgAIiwQIKEkNv" + 
-        "bXBsZXhPcHRpb25UeXBlMhIyCgNiYXIYASABKAsyJS5wcm90b2J1Zl91bml0" + 
-        "dGVzdC5Db21wbGV4T3B0aW9uVHlwZTESCwoDYmF6GAIgASgFEkYKBGZyZWQY" + 
-        "AyABKAsyOC5wcm90b2J1Zl91bml0dGVzdC5Db21wbGV4T3B0aW9uVHlwZTIu" + 
-        "Q29tcGxleE9wdGlvblR5cGU0GpcBChJDb21wbGV4T3B0aW9uVHlwZTQSDQoF" + 
-        "d2FsZG8YASABKAUycgoMY29tcGxleF9vcHQ0Eh8uZ29vZ2xlLnByb3RvYnVm" + 
-        "Lk1lc3NhZ2VPcHRpb25zGIr10QMgASgLMjgucHJvdG9idWZfdW5pdHRlc3Qu" + 
-        "Q29tcGxleE9wdGlvblR5cGUyLkNvbXBsZXhPcHRpb25UeXBlNCoICGQQgICA" + 
-        "gAIinAEKEkNvbXBsZXhPcHRpb25UeXBlMxILCgNxdXgYASABKAUSVAoSY29t" + 
-        "cGxleG9wdGlvbnR5cGU1GAIgASgKMjgucHJvdG9idWZfdW5pdHRlc3QuQ29t" + 
-        "cGxleE9wdGlvblR5cGUzLkNvbXBsZXhPcHRpb25UeXBlNRojChJDb21wbGV4" + 
-        "T3B0aW9uVHlwZTUSDQoFcGx1Z2gYAyABKAUiHwoLQ29tcGxleE9wdDYSEAoF" + 
-        "eHl6enkY37/PAyABKAUi0AEKFVZhcmlvdXNDb21wbGV4T3B0aW9uczq2AePc" + 
-        "/Bz4/fscGOTc/BzSqI8dAwizD/rekB0CCAn63pAdBBMYFhSq/ZAdAxDbB6r9" + 
-        "kB0G+OaXHY4Fqv2QHQUKAwjnBar9kB0ICgbYhZ4dzw+q/ZAdCgoIkvWdHQMI" + 
-        "2A+q/ZAdCMKslx0DCOUFqv2QHQvCrJcdBtiFnh3OD6r9kB0NwqyXHQiS9Z0d" + 
-        "AwjJEKr9kB0FGgMIwQKi4pUdAggqouKVHQbYhZ4dxAKi4pUdCJL1nR0DCOwG" + 
-        "KjYKCk1ldGhvZE9wdDESEwoPTUVUSE9ET1BUMV9WQUwxEAESEwoPTUVUSE9E" + 
-        "T1BUMV9WQUwyEAIyjgEKHFRlc3RTZXJ2aWNlV2l0aEN1c3RvbU9wdGlvbnMS" + 
-        "YwoDRm9vEikucHJvdG9idWZfdW5pdHRlc3QuQ3VzdG9tT3B0aW9uRm9vUmVx" + 
-        "dWVzdBoqLnByb3RvYnVmX3VuaXR0ZXN0LkN1c3RvbU9wdGlvbkZvb1Jlc3Bv" + 
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-        "cm90b2J1Zi5GaWxlT3B0aW9ucxiOndgDIAEoBDo4CgxtZXNzYWdlX29wdDES" + 
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-        "bU9wdGlvbnNQcm90b0ZpbGXw6MEd6q3A5SQ="),
-        new pbd::FileDescriptor[] {
-          global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
-          global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor, 
-        });
     #endregion
-    
     #region Extensions
     public const int FileOpt1FieldNumber = 7736974;
-    public static readonly pb::GeneratedExtensionBase<ulong> FileOpt1 =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[0]);
+    public static pb::GeneratedExtensionBase<ulong> FileOpt1;
     public const int MessageOpt1FieldNumber = 7739036;
-    public static readonly pb::GeneratedExtensionBase<int> MessageOpt1 =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[1]);
+    public static pb::GeneratedExtensionBase<int> MessageOpt1;
     public const int FieldOpt1FieldNumber = 7740936;
-    public static readonly pb::GeneratedExtensionBase<ulong> FieldOpt1 =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[2]);
+    public static pb::GeneratedExtensionBase<ulong> FieldOpt1;
     public const int FieldOpt2FieldNumber = 7753913;
-    public static readonly pb::GeneratedExtensionBase<int> FieldOpt2 =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[3]);
+    public static pb::GeneratedExtensionBase<int> FieldOpt2;
     public const int EnumOpt1FieldNumber = 7753576;
-    public static readonly pb::GeneratedExtensionBase<int> EnumOpt1 =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[4]);
+    public static pb::GeneratedExtensionBase<int> EnumOpt1;
     public const int ServiceOpt1FieldNumber = 7887650;
-    public static readonly pb::GeneratedExtensionBase<long> ServiceOpt1 =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[5]);
+    public static pb::GeneratedExtensionBase<long> ServiceOpt1;
     public const int MethodOpt1FieldNumber = 7890860;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.MethodOpt1> MethodOpt1 =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.MethodOpt1>.CreateInstance(Descriptor.Extensions[6]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.MethodOpt1> MethodOpt1;
     public const int BoolOptFieldNumber = 7706090;
-    public static readonly pb::GeneratedExtensionBase<bool> BoolOpt =
-        pb::GeneratedSingleExtension<bool>.CreateInstance(Descriptor.Extensions[7]);
+    public static pb::GeneratedExtensionBase<bool> BoolOpt;
     public const int Int32OptFieldNumber = 7705709;
-    public static readonly pb::GeneratedExtensionBase<int> Int32Opt =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[8]);
+    public static pb::GeneratedExtensionBase<int> Int32Opt;
     public const int Int64OptFieldNumber = 7705542;
-    public static readonly pb::GeneratedExtensionBase<long> Int64Opt =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[9]);
+    public static pb::GeneratedExtensionBase<long> Int64Opt;
     public const int Uint32OptFieldNumber = 7704880;
-    public static readonly pb::GeneratedExtensionBase<uint> Uint32Opt =
-        pb::GeneratedSingleExtension<uint>.CreateInstance(Descriptor.Extensions[10]);
+    public static pb::GeneratedExtensionBase<uint> Uint32Opt;
     public const int Uint64OptFieldNumber = 7702367;
-    public static readonly pb::GeneratedExtensionBase<ulong> Uint64Opt =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[11]);
+    public static pb::GeneratedExtensionBase<ulong> Uint64Opt;
     public const int Sint32OptFieldNumber = 7701568;
-    public static readonly pb::GeneratedExtensionBase<int> Sint32Opt =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[12]);
+    public static pb::GeneratedExtensionBase<int> Sint32Opt;
     public const int Sint64OptFieldNumber = 7700863;
-    public static readonly pb::GeneratedExtensionBase<long> Sint64Opt =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[13]);
+    public static pb::GeneratedExtensionBase<long> Sint64Opt;
     public const int Fixed32OptFieldNumber = 7700307;
-    public static readonly pb::GeneratedExtensionBase<uint> Fixed32Opt =
-        pb::GeneratedSingleExtension<uint>.CreateInstance(Descriptor.Extensions[14]);
+    public static pb::GeneratedExtensionBase<uint> Fixed32Opt;
     public const int Fixed64OptFieldNumber = 7700194;
-    public static readonly pb::GeneratedExtensionBase<ulong> Fixed64Opt =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[15]);
+    public static pb::GeneratedExtensionBase<ulong> Fixed64Opt;
     public const int Sfixed32OptFieldNumber = 7698645;
-    public static readonly pb::GeneratedExtensionBase<int> Sfixed32Opt =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[16]);
+    public static pb::GeneratedExtensionBase<int> Sfixed32Opt;
     public const int Sfixed64OptFieldNumber = 7685475;
-    public static readonly pb::GeneratedExtensionBase<long> Sfixed64Opt =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[17]);
+    public static pb::GeneratedExtensionBase<long> Sfixed64Opt;
     public const int FloatOptFieldNumber = 7675390;
-    public static readonly pb::GeneratedExtensionBase<float> FloatOpt =
-        pb::GeneratedSingleExtension<float>.CreateInstance(Descriptor.Extensions[18]);
+    public static pb::GeneratedExtensionBase<float> FloatOpt;
     public const int DoubleOptFieldNumber = 7673293;
-    public static readonly pb::GeneratedExtensionBase<double> DoubleOpt =
-        pb::GeneratedSingleExtension<double>.CreateInstance(Descriptor.Extensions[19]);
+    public static pb::GeneratedExtensionBase<double> DoubleOpt;
     public const int StringOptFieldNumber = 7673285;
-    public static readonly pb::GeneratedExtensionBase<string> StringOpt =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[20]);
+    public static pb::GeneratedExtensionBase<string> StringOpt;
     public const int BytesOptFieldNumber = 7673238;
-    public static readonly pb::GeneratedExtensionBase<pb::ByteString> BytesOpt =
-        pb::GeneratedSingleExtension<pb::ByteString>.CreateInstance(Descriptor.Extensions[21]);
+    public static pb::GeneratedExtensionBase<pb::ByteString> BytesOpt;
     public const int EnumOptFieldNumber = 7673233;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Types.TestEnumType> EnumOpt =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Types.TestEnumType>.CreateInstance(Descriptor.Extensions[22]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Types.TestEnumType> EnumOpt;
     public const int MessageTypeOptFieldNumber = 7665967;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType> MessageTypeOpt =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType>.CreateInstance(Descriptor.Extensions[23]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType> MessageTypeOpt;
     public const int QuuxFieldNumber = 7663707;
-    public static readonly pb::GeneratedExtensionBase<int> Quux =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[24]);
+    public static pb::GeneratedExtensionBase<int> Quux;
     public const int CorgeFieldNumber = 7663442;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3> Corge =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3>.CreateInstance(Descriptor.Extensions[25]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3> Corge;
     public const int GraultFieldNumber = 7650927;
-    public static readonly pb::GeneratedExtensionBase<int> Grault =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[26]);
+    public static pb::GeneratedExtensionBase<int> Grault;
     public const int GarplyFieldNumber = 7649992;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1> Garply =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1>.CreateInstance(Descriptor.Extensions[27]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1> Garply;
     public const int ComplexOpt1FieldNumber = 7646756;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1> ComplexOpt1 =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1>.CreateInstance(Descriptor.Extensions[28]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1> ComplexOpt1;
     public const int ComplexOpt2FieldNumber = 7636949;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2> ComplexOpt2 =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2>.CreateInstance(Descriptor.Extensions[29]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2> ComplexOpt2;
     public const int ComplexOpt3FieldNumber = 7636463;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3> ComplexOpt3 =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3>.CreateInstance(Descriptor.Extensions[30]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3> ComplexOpt3;
     public const int ComplexOpt6FieldNumber = 7595468;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6> ComplexOpt6 =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6>.CreateInstance(Descriptor.Extensions[31]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6> ComplexOpt6;
     #endregion
     
     #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageWithCustomOptions__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions, global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions.Builder> internal__static_protobuf_unittest_TestMessageWithCustomOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions, global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions.Builder>(internal__static_protobuf_unittest_TestMessageWithCustomOptions__Descriptor,
-            new string[] { "Field1", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionFooRequest__Descriptor
-        = Descriptor.MessageTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest.Builder> internal__static_protobuf_unittest_CustomOptionFooRequest__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest.Builder>(internal__static_protobuf_unittest_CustomOptionFooRequest__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionFooResponse__Descriptor
-        = Descriptor.MessageTypes[2];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse.Builder> internal__static_protobuf_unittest_CustomOptionFooResponse__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse.Builder>(internal__static_protobuf_unittest_CustomOptionFooResponse__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_DummyMessageContainingEnum__Descriptor
-        = Descriptor.MessageTypes[3];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum, global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Builder> internal__static_protobuf_unittest_DummyMessageContainingEnum__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum, global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Builder>(internal__static_protobuf_unittest_DummyMessageContainingEnum__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__Descriptor
-        = Descriptor.MessageTypes[4];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType, global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType.Builder> internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType, global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType.Builder>(internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionMinIntegerValues__Descriptor
-        = Descriptor.MessageTypes[5];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues.Builder> internal__static_protobuf_unittest_CustomOptionMinIntegerValues__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues.Builder>(internal__static_protobuf_unittest_CustomOptionMinIntegerValues__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__Descriptor
-        = Descriptor.MessageTypes[6];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues.Builder> internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues.Builder>(internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionOtherValues__Descriptor
-        = Descriptor.MessageTypes[7];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues.Builder> internal__static_protobuf_unittest_CustomOptionOtherValues__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues.Builder>(internal__static_protobuf_unittest_CustomOptionOtherValues__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_SettingRealsFromPositiveInts__Descriptor
-        = Descriptor.MessageTypes[8];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts.Builder> internal__static_protobuf_unittest_SettingRealsFromPositiveInts__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts.Builder>(internal__static_protobuf_unittest_SettingRealsFromPositiveInts__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_SettingRealsFromNegativeInts__Descriptor
-        = Descriptor.MessageTypes[9];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts.Builder> internal__static_protobuf_unittest_SettingRealsFromNegativeInts__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts.Builder>(internal__static_protobuf_unittest_SettingRealsFromNegativeInts__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType1__Descriptor
-        = Descriptor.MessageTypes[10];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1.Builder> internal__static_protobuf_unittest_ComplexOptionType1__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1.Builder>(internal__static_protobuf_unittest_ComplexOptionType1__Descriptor,
-            new string[] { "Foo", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType2__Descriptor
-        = Descriptor.MessageTypes[11];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Builder> internal__static_protobuf_unittest_ComplexOptionType2__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Builder>(internal__static_protobuf_unittest_ComplexOptionType2__Descriptor,
-            new string[] { "Bar", "Baz", "Fred", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__Descriptor
-        = internal__static_protobuf_unittest_ComplexOptionType2__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Builder> internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Builder>(internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__Descriptor,
-            new string[] { "Waldo", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType3__Descriptor
-        = Descriptor.MessageTypes[12];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Builder> internal__static_protobuf_unittest_ComplexOptionType3__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Builder>(internal__static_protobuf_unittest_ComplexOptionType3__Descriptor,
-            new string[] { "Qux", "ComplexOptionType5", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__Descriptor
-        = internal__static_protobuf_unittest_ComplexOptionType3__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5.Builder> internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5.Builder>(internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__Descriptor,
-            new string[] { "Plugh", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOpt6__Descriptor
-        = Descriptor.MessageTypes[13];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6, global::Google.ProtocolBuffers.TestProtos.ComplexOpt6.Builder> internal__static_protobuf_unittest_ComplexOpt6__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6, global::Google.ProtocolBuffers.TestProtos.ComplexOpt6.Builder>(internal__static_protobuf_unittest_ComplexOpt6__Descriptor,
-            new string[] { "Xyzzy", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_VariousComplexOptions__Descriptor
-        = Descriptor.MessageTypes[14];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions, global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions.Builder> internal__static_protobuf_unittest_VariousComplexOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions, global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions.Builder>(internal__static_protobuf_unittest_VariousComplexOptions__Descriptor,
-            new string[] { });
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageWithCustomOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions, global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions.Builder> internal__static_protobuf_unittest_TestMessageWithCustomOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionFooRequest__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest.Builder> internal__static_protobuf_unittest_CustomOptionFooRequest__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionFooResponse__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse.Builder> internal__static_protobuf_unittest_CustomOptionFooResponse__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_DummyMessageContainingEnum__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum, global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Builder> internal__static_protobuf_unittest_DummyMessageContainingEnum__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType, global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType.Builder> internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionMinIntegerValues__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues.Builder> internal__static_protobuf_unittest_CustomOptionMinIntegerValues__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues.Builder> internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_CustomOptionOtherValues__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues.Builder> internal__static_protobuf_unittest_CustomOptionOtherValues__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_SettingRealsFromPositiveInts__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts.Builder> internal__static_protobuf_unittest_SettingRealsFromPositiveInts__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_SettingRealsFromNegativeInts__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts.Builder> internal__static_protobuf_unittest_SettingRealsFromNegativeInts__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType1__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1.Builder> internal__static_protobuf_unittest_ComplexOptionType1__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType2__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Builder> internal__static_protobuf_unittest_ComplexOptionType2__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Builder> internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType3__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Builder> internal__static_protobuf_unittest_ComplexOptionType3__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5.Builder> internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ComplexOpt6__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6, global::Google.ProtocolBuffers.TestProtos.ComplexOpt6.Builder> internal__static_protobuf_unittest_ComplexOpt6__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_VariousComplexOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions, global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions.Builder> internal__static_protobuf_unittest_VariousComplexOptions__FieldAccessorTable;
+    #endregion
+    #region Descriptor
+    public static pbd::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestCustomOptionsProtoFile() {
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+          "bU9wdGlvbnNQcm90b0ZpbGXw6MEd6q3A5SQ=");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_TestMessageWithCustomOptions__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_TestMessageWithCustomOptions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions, global::Google.ProtocolBuffers.TestProtos.TestMessageWithCustomOptions.Builder>(internal__static_protobuf_unittest_TestMessageWithCustomOptions__Descriptor,
+                new string[] { "Field1", });
+        internal__static_protobuf_unittest_CustomOptionFooRequest__Descriptor = Descriptor.MessageTypes[1];
+        internal__static_protobuf_unittest_CustomOptionFooRequest__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooRequest.Builder>(internal__static_protobuf_unittest_CustomOptionFooRequest__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_CustomOptionFooResponse__Descriptor = Descriptor.MessageTypes[2];
+        internal__static_protobuf_unittest_CustomOptionFooResponse__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse, global::Google.ProtocolBuffers.TestProtos.CustomOptionFooResponse.Builder>(internal__static_protobuf_unittest_CustomOptionFooResponse__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_DummyMessageContainingEnum__Descriptor = Descriptor.MessageTypes[3];
+        internal__static_protobuf_unittest_DummyMessageContainingEnum__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum, global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Builder>(internal__static_protobuf_unittest_DummyMessageContainingEnum__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__Descriptor = Descriptor.MessageTypes[4];
+        internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType, global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType.Builder>(internal__static_protobuf_unittest_DummyMessageInvalidAsOptionType__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_CustomOptionMinIntegerValues__Descriptor = Descriptor.MessageTypes[5];
+        internal__static_protobuf_unittest_CustomOptionMinIntegerValues__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMinIntegerValues.Builder>(internal__static_protobuf_unittest_CustomOptionMinIntegerValues__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__Descriptor = Descriptor.MessageTypes[6];
+        internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionMaxIntegerValues.Builder>(internal__static_protobuf_unittest_CustomOptionMaxIntegerValues__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_CustomOptionOtherValues__Descriptor = Descriptor.MessageTypes[7];
+        internal__static_protobuf_unittest_CustomOptionOtherValues__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues, global::Google.ProtocolBuffers.TestProtos.CustomOptionOtherValues.Builder>(internal__static_protobuf_unittest_CustomOptionOtherValues__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_SettingRealsFromPositiveInts__Descriptor = Descriptor.MessageTypes[8];
+        internal__static_protobuf_unittest_SettingRealsFromPositiveInts__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromPositiveInts.Builder>(internal__static_protobuf_unittest_SettingRealsFromPositiveInts__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_SettingRealsFromNegativeInts__Descriptor = Descriptor.MessageTypes[9];
+        internal__static_protobuf_unittest_SettingRealsFromNegativeInts__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts, global::Google.ProtocolBuffers.TestProtos.SettingRealsFromNegativeInts.Builder>(internal__static_protobuf_unittest_SettingRealsFromNegativeInts__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_ComplexOptionType1__Descriptor = Descriptor.MessageTypes[10];
+        internal__static_protobuf_unittest_ComplexOptionType1__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1.Builder>(internal__static_protobuf_unittest_ComplexOptionType1__Descriptor,
+                new string[] { "Foo", });
+        internal__static_protobuf_unittest_ComplexOptionType2__Descriptor = Descriptor.MessageTypes[11];
+        internal__static_protobuf_unittest_ComplexOptionType2__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Builder>(internal__static_protobuf_unittest_ComplexOptionType2__Descriptor,
+                new string[] { "Bar", "Baz", "Fred", });
+        internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__Descriptor = internal__static_protobuf_unittest_ComplexOptionType2__Descriptor.NestedTypes[0];
+        internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Builder>(internal__static_protobuf_unittest_ComplexOptionType2_ComplexOptionType4__Descriptor,
+                new string[] { "Waldo", });
+        global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.ComplexOpt4 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Descriptor.Extensions[0]);
+        internal__static_protobuf_unittest_ComplexOptionType3__Descriptor = Descriptor.MessageTypes[12];
+        internal__static_protobuf_unittest_ComplexOptionType3__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Builder>(internal__static_protobuf_unittest_ComplexOptionType3__Descriptor,
+                new string[] { "Qux", "ComplexOptionType5", });
+        internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__Descriptor = internal__static_protobuf_unittest_ComplexOptionType3__Descriptor.NestedTypes[0];
+        internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5, global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3.Types.ComplexOptionType5.Builder>(internal__static_protobuf_unittest_ComplexOptionType3_ComplexOptionType5__Descriptor,
+                new string[] { "Plugh", });
+        internal__static_protobuf_unittest_ComplexOpt6__Descriptor = Descriptor.MessageTypes[13];
+        internal__static_protobuf_unittest_ComplexOpt6__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6, global::Google.ProtocolBuffers.TestProtos.ComplexOpt6.Builder>(internal__static_protobuf_unittest_ComplexOpt6__Descriptor,
+                new string[] { "Xyzzy", });
+        internal__static_protobuf_unittest_VariousComplexOptions__Descriptor = Descriptor.MessageTypes[14];
+        internal__static_protobuf_unittest_VariousComplexOptions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions, global::Google.ProtocolBuffers.TestProtos.VariousComplexOptions.Builder>(internal__static_protobuf_unittest_VariousComplexOptions__Descriptor,
+                new string[] { });
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FileOpt1 = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[0]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.MessageOpt1 = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[1]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FieldOpt1 = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[2]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FieldOpt2 = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[3]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.EnumOpt1 = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[4]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ServiceOpt1 = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[5]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.MethodOpt1 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.MethodOpt1>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[6]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.BoolOpt = pb::GeneratedSingleExtension<bool>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[7]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Int32Opt = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[8]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Int64Opt = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[9]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Uint32Opt = pb::GeneratedSingleExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[10]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Uint64Opt = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[11]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sint32Opt = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[12]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sint64Opt = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[13]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Fixed32Opt = pb::GeneratedSingleExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[14]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Fixed64Opt = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[15]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sfixed32Opt = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[16]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Sfixed64Opt = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[17]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.FloatOpt = pb::GeneratedSingleExtension<float>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[18]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.DoubleOpt = pb::GeneratedSingleExtension<double>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[19]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.StringOpt = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[20]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.BytesOpt = pb::GeneratedSingleExtension<pb::ByteString>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[21]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.EnumOpt = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.DummyMessageContainingEnum.Types.TestEnumType>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[22]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.MessageTypeOpt = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.DummyMessageInvalidAsOptionType>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[23]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Quux = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[24]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Corge = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[25]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Grault = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[26]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Garply = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[27]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt1 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType1>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[28]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt2 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[29]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt3 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType3>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[30]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.ComplexOpt6 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOpt6>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor.Extensions[31]);
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
+          global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
+          global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor, 
+          }, assigner);
+    }
     #endregion
+    
   }
   #region Enums
   public enum MethodOpt1 {
@@ -447,6 +514,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestMessageWithCustomOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class CustomOptionFooRequest : pb::GeneratedMessage<CustomOptionFooRequest, CustomOptionFooRequest.Builder> {
@@ -547,6 +617,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static CustomOptionFooRequest() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class CustomOptionFooResponse : pb::GeneratedMessage<CustomOptionFooResponse, CustomOptionFooResponse.Builder> {
@@ -647,6 +720,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static CustomOptionFooResponse() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class DummyMessageContainingEnum : pb::GeneratedMessage<DummyMessageContainingEnum, DummyMessageContainingEnum.Builder> {
@@ -757,6 +833,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static DummyMessageContainingEnum() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class DummyMessageInvalidAsOptionType : pb::GeneratedMessage<DummyMessageInvalidAsOptionType, DummyMessageInvalidAsOptionType.Builder> {
@@ -857,6 +936,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static DummyMessageInvalidAsOptionType() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class CustomOptionMinIntegerValues : pb::GeneratedMessage<CustomOptionMinIntegerValues, CustomOptionMinIntegerValues.Builder> {
@@ -957,6 +1039,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static CustomOptionMinIntegerValues() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class CustomOptionMaxIntegerValues : pb::GeneratedMessage<CustomOptionMaxIntegerValues, CustomOptionMaxIntegerValues.Builder> {
@@ -1057,6 +1142,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static CustomOptionMaxIntegerValues() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class CustomOptionOtherValues : pb::GeneratedMessage<CustomOptionOtherValues, CustomOptionOtherValues.Builder> {
@@ -1157,6 +1245,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static CustomOptionOtherValues() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class SettingRealsFromPositiveInts : pb::GeneratedMessage<SettingRealsFromPositiveInts, SettingRealsFromPositiveInts.Builder> {
@@ -1257,6 +1348,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static SettingRealsFromPositiveInts() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class SettingRealsFromNegativeInts : pb::GeneratedMessage<SettingRealsFromNegativeInts, SettingRealsFromNegativeInts.Builder> {
@@ -1357,6 +1451,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static SettingRealsFromNegativeInts() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ComplexOptionType1 : pb::ExtendableMessage<ComplexOptionType1, ComplexOptionType1.Builder> {
@@ -1485,6 +1582,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static ComplexOptionType1() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ComplexOptionType2 : pb::ExtendableMessage<ComplexOptionType2, ComplexOptionType2.Builder> {
@@ -1534,8 +1634,7 @@ namespace Google.ProtocolBuffers.TestProtos {
         }
         
         public const int ComplexOpt4FieldNumber = 7633546;
-        public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4> ComplexOpt4 =
-            pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4>.CreateInstance(Descriptor.Extensions[0]);
+        public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ComplexOptionType2.Types.ComplexOptionType4> ComplexOpt4;
         public const int WaldoFieldNumber = 1;
         private bool hasWaldo;
         private int waldo_ = 0;
@@ -1640,6 +1739,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static ComplexOptionType4() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+        }
       }
       
     }
@@ -1841,6 +1943,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static ComplexOptionType2() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ComplexOptionType3 : pb::GeneratedMessage<ComplexOptionType3, ComplexOptionType3.Builder> {
@@ -1993,6 +2098,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static ComplexOptionType5() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+        }
       }
       
     }
@@ -2148,6 +2256,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static ComplexOptionType3() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ComplexOpt6 : pb::GeneratedMessage<ComplexOpt6, ComplexOpt6.Builder> {
@@ -2276,6 +2387,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static ComplexOpt6() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class VariousComplexOptions : pb::GeneratedMessage<VariousComplexOptions, VariousComplexOptions.Builder> {
@@ -2376,6 +2490,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static VariousComplexOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestCustomOptionsProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestEmbedOptimizeForProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestEmbedOptimizeForProtoFile.cs
index 72c52ea2..fdd4acac 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestEmbedOptimizeForProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestEmbedOptimizeForProtoFile.cs
@@ -8,34 +8,51 @@ namespace Google.ProtocolBuffers.TestProtos {
   
   public static partial class UnitTestEmbedOptimizeForProtoFile {
   
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestEmbedOptimizedForSize__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize.Builder> internal__static_protobuf_unittest_TestEmbedOptimizedForSize__FieldAccessorTable;
+    #endregion
     #region Descriptor
     public static pbd::FileDescriptor Descriptor {
       get { return descriptor; }
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "CjFnb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfZW1iZWRfb3B0aW1pemVfZm9y" + 
-        "LnByb3RvEhFwcm90b2J1Zl91bml0dGVzdBokZ29vZ2xlL3Byb3RvYnVmL2Nz" + 
-        "aGFycF9vcHRpb25zLnByb3RvGitnb29nbGUvcHJvdG9idWYvdW5pdHRlc3Rf" + 
-        "b3B0aW1pemVfZm9yLnByb3RvIqEBChlUZXN0RW1iZWRPcHRpbWl6ZWRGb3JT" + 
-        "aXplEkEKEG9wdGlvbmFsX21lc3NhZ2UYASABKAsyJy5wcm90b2J1Zl91bml0" + 
-        "dGVzdC5UZXN0T3B0aW1pemVkRm9yU2l6ZRJBChByZXBlYXRlZF9tZXNzYWdl" + 
-        "GAIgAygLMicucHJvdG9idWZfdW5pdHRlc3QuVGVzdE9wdGltaXplZEZvclNp" + 
-        "emVCS0gBwj5GCiFHb29nbGUuUHJvdG9jb2xCdWZmZXJzLlRlc3RQcm90b3MS" + 
-        "IVVuaXRUZXN0RW1iZWRPcHRpbWl6ZUZvclByb3RvRmlsZQ=="),
-        new pbd::FileDescriptor[] {
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestEmbedOptimizeForProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "CjFnb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfZW1iZWRfb3B0aW1pemVfZm9y" + 
+          "LnByb3RvEhFwcm90b2J1Zl91bml0dGVzdBokZ29vZ2xlL3Byb3RvYnVmL2Nz" + 
+          "aGFycF9vcHRpb25zLnByb3RvGitnb29nbGUvcHJvdG9idWYvdW5pdHRlc3Rf" + 
+          "b3B0aW1pemVfZm9yLnByb3RvIqEBChlUZXN0RW1iZWRPcHRpbWl6ZWRGb3JT" + 
+          "aXplEkEKEG9wdGlvbmFsX21lc3NhZ2UYASABKAsyJy5wcm90b2J1Zl91bml0" + 
+          "dGVzdC5UZXN0T3B0aW1pemVkRm9yU2l6ZRJBChByZXBlYXRlZF9tZXNzYWdl" + 
+          "GAIgAygLMicucHJvdG9idWZfdW5pdHRlc3QuVGVzdE9wdGltaXplZEZvclNp" + 
+          "emVCS0gBwj5GCiFHb29nbGUuUHJvdG9jb2xCdWZmZXJzLlRlc3RQcm90b3MS" + 
+          "IVVuaXRUZXN0RW1iZWRPcHRpbWl6ZUZvclByb3RvRmlsZQ==");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_TestEmbedOptimizedForSize__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_TestEmbedOptimizedForSize__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestEmbedOptimizedForSize__Descriptor,
+                new string[] { "OptionalMessage", "RepeatedMessage", });
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestOptimizeForProtoFile.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
           global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
           global::Google.ProtocolBuffers.TestProtos.UnitTestOptimizeForProtoFile.Descriptor, 
-        });
+          }, assigner);
+    }
     #endregion
     
-    #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestEmbedOptimizedForSize__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize.Builder> internal__static_protobuf_unittest_TestEmbedOptimizedForSize__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestEmbedOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestEmbedOptimizedForSize__Descriptor,
-            new string[] { "OptionalMessage", "RepeatedMessage", });
-    #endregion
   }
   #region Messages
   public sealed partial class TestEmbedOptimizedForSize : pb::GeneratedMessage<TestEmbedOptimizedForSize, TestEmbedOptimizedForSize.Builder> {
@@ -342,6 +359,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestEmbedOptimizedForSize() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestEmbedOptimizeForProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestImportProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestImportProtoFile.cs
index 45168b6c..16068968 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestImportProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestImportProtoFile.cs
@@ -8,31 +8,47 @@ namespace Google.ProtocolBuffers.TestProtos {
   
   public static partial class UnitTestImportProtoFile {
   
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_import_ImportMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ImportMessage, global::Google.ProtocolBuffers.TestProtos.ImportMessage.Builder> internal__static_protobuf_unittest_import_ImportMessage__FieldAccessorTable;
+    #endregion
     #region Descriptor
     public static pbd::FileDescriptor Descriptor {
       get { return descriptor; }
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "CiVnb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfaW1wb3J0LnByb3RvEhhwcm90" + 
-        "b2J1Zl91bml0dGVzdF9pbXBvcnQaJGdvb2dsZS9wcm90b2J1Zi9jc2hhcnBf" + 
-        "b3B0aW9ucy5wcm90byIaCg1JbXBvcnRNZXNzYWdlEgkKAWQYASABKAUqPAoK" + 
-        "SW1wb3J0RW51bRIOCgpJTVBPUlRfRk9PEAcSDgoKSU1QT1JUX0JBUhAIEg4K" + 
-        "CklNUE9SVF9CQVoQCUJbChhjb20uZ29vZ2xlLnByb3RvYnVmLnRlc3RIAcI+" + 
-        "PAohR29vZ2xlLlByb3RvY29sQnVmZmVycy5UZXN0UHJvdG9zEhdVbml0VGVz" + 
-        "dEltcG9ydFByb3RvRmlsZQ=="),
-        new pbd::FileDescriptor[] {
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestImportProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "CiVnb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfaW1wb3J0LnByb3RvEhhwcm90" + 
+          "b2J1Zl91bml0dGVzdF9pbXBvcnQaJGdvb2dsZS9wcm90b2J1Zi9jc2hhcnBf" + 
+          "b3B0aW9ucy5wcm90byIaCg1JbXBvcnRNZXNzYWdlEgkKAWQYASABKAUqPAoK" + 
+          "SW1wb3J0RW51bRIOCgpJTVBPUlRfRk9PEAcSDgoKSU1QT1JUX0JBUhAIEg4K" + 
+          "CklNUE9SVF9CQVoQCUJbChhjb20uZ29vZ2xlLnByb3RvYnVmLnRlc3RIAcI+" + 
+          "PAohR29vZ2xlLlByb3RvY29sQnVmZmVycy5UZXN0UHJvdG9zEhdVbml0VGVz" + 
+          "dEltcG9ydFByb3RvRmlsZQ==");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_import_ImportMessage__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_import_ImportMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ImportMessage, global::Google.ProtocolBuffers.TestProtos.ImportMessage.Builder>(internal__static_protobuf_unittest_import_ImportMessage__Descriptor,
+                new string[] { "D", });
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
           global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
-        });
+          }, assigner);
+    }
     #endregion
     
-    #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_import_ImportMessage__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ImportMessage, global::Google.ProtocolBuffers.TestProtos.ImportMessage.Builder> internal__static_protobuf_unittest_import_ImportMessage__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ImportMessage, global::Google.ProtocolBuffers.TestProtos.ImportMessage.Builder>(internal__static_protobuf_unittest_import_ImportMessage__Descriptor,
-            new string[] { "D", });
-    #endregion
   }
   #region Enums
   public enum ImportEnum {
@@ -253,6 +269,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static ImportMessage() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestImportProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs
index c21a552b..d526bdf0 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestMessageSetProtoFile.cs
@@ -8,65 +8,90 @@ namespace Google.ProtocolBuffers.TestProtos {
   
   public static partial class UnitTestMessageSetProtoFile {
   
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.MessageSetExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.MessageSetExtension);
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSet__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSet, global::Google.ProtocolBuffers.TestProtos.TestMessageSet.Builder> internal__static_protobuf_unittest_TestMessageSet__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSetContainer__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer, global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer.Builder> internal__static_protobuf_unittest_TestMessageSetContainer__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSetExtension1__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.Builder> internal__static_protobuf_unittest_TestMessageSetExtension1__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSetExtension2__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.Builder> internal__static_protobuf_unittest_TestMessageSetExtension2__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_RawMessageSet__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Builder> internal__static_protobuf_unittest_RawMessageSet__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_RawMessageSet_Item__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item.Builder> internal__static_protobuf_unittest_RawMessageSet_Item__FieldAccessorTable;
+    #endregion
     #region Descriptor
     public static pbd::FileDescriptor Descriptor {
       get { return descriptor; }
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "CiNnb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfbXNldC5wcm90bxIRcHJvdG9i" + 
-        "dWZfdW5pdHRlc3QaJGdvb2dsZS9wcm90b2J1Zi9jc2hhcnBfb3B0aW9ucy5w" + 
-        "cm90byIeCg5UZXN0TWVzc2FnZVNldCoICAQQgICAgAI6AggBIlEKF1Rlc3RN" + 
-        "ZXNzYWdlU2V0Q29udGFpbmVyEjYKC21lc3NhZ2Vfc2V0GAEgASgLMiEucHJv" + 
-        "dG9idWZfdW5pdHRlc3QuVGVzdE1lc3NhZ2VTZXQilgEKGFRlc3RNZXNzYWdl" + 
-        "U2V0RXh0ZW5zaW9uMRIJCgFpGA8gASgFMm8KFW1lc3NhZ2Vfc2V0X2V4dGVu" + 
-        "c2lvbhIhLnByb3RvYnVmX3VuaXR0ZXN0LlRlc3RNZXNzYWdlU2V0GLCmXiAB" + 
-        "KAsyKy5wcm90b2J1Zl91bml0dGVzdC5UZXN0TWVzc2FnZVNldEV4dGVuc2lv" + 
-        "bjEimAEKGFRlc3RNZXNzYWdlU2V0RXh0ZW5zaW9uMhILCgNzdHIYGSABKAky" + 
-        "bwoVbWVzc2FnZV9zZXRfZXh0ZW5zaW9uEiEucHJvdG9idWZfdW5pdHRlc3Qu" + 
-        "VGVzdE1lc3NhZ2VTZXQY+bteIAEoCzIrLnByb3RvYnVmX3VuaXR0ZXN0LlRl" + 
-        "c3RNZXNzYWdlU2V0RXh0ZW5zaW9uMiJuCg1SYXdNZXNzYWdlU2V0EjMKBGl0" + 
-        "ZW0YASADKAoyJS5wcm90b2J1Zl91bml0dGVzdC5SYXdNZXNzYWdlU2V0Lkl0" + 
-        "ZW0aKAoESXRlbRIPCgd0eXBlX2lkGAIgAigFEg8KB21lc3NhZ2UYAyACKAxC" + 
-        "RUgBwj5ACiFHb29nbGUuUHJvdG9jb2xCdWZmZXJzLlRlc3RQcm90b3MSG1Vu" + 
-        "aXRUZXN0TWVzc2FnZVNldFByb3RvRmlsZQ=="),
-        new pbd::FileDescriptor[] {
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestMessageSetProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "CiNnb29nbGUvcHJvdG9idWYvdW5pdHRlc3RfbXNldC5wcm90bxIRcHJvdG9i" + 
+          "dWZfdW5pdHRlc3QaJGdvb2dsZS9wcm90b2J1Zi9jc2hhcnBfb3B0aW9ucy5w" + 
+          "cm90byIeCg5UZXN0TWVzc2FnZVNldCoICAQQgICAgAI6AggBIlEKF1Rlc3RN" + 
+          "ZXNzYWdlU2V0Q29udGFpbmVyEjYKC21lc3NhZ2Vfc2V0GAEgASgLMiEucHJv" + 
+          "dG9idWZfdW5pdHRlc3QuVGVzdE1lc3NhZ2VTZXQilgEKGFRlc3RNZXNzYWdl" + 
+          "U2V0RXh0ZW5zaW9uMRIJCgFpGA8gASgFMm8KFW1lc3NhZ2Vfc2V0X2V4dGVu" + 
+          "c2lvbhIhLnByb3RvYnVmX3VuaXR0ZXN0LlRlc3RNZXNzYWdlU2V0GLCmXiAB" + 
+          "KAsyKy5wcm90b2J1Zl91bml0dGVzdC5UZXN0TWVzc2FnZVNldEV4dGVuc2lv" + 
+          "bjEimAEKGFRlc3RNZXNzYWdlU2V0RXh0ZW5zaW9uMhILCgNzdHIYGSABKAky" + 
+          "bwoVbWVzc2FnZV9zZXRfZXh0ZW5zaW9uEiEucHJvdG9idWZfdW5pdHRlc3Qu" + 
+          "VGVzdE1lc3NhZ2VTZXQY+bteIAEoCzIrLnByb3RvYnVmX3VuaXR0ZXN0LlRl" + 
+          "c3RNZXNzYWdlU2V0RXh0ZW5zaW9uMiJuCg1SYXdNZXNzYWdlU2V0EjMKBGl0" + 
+          "ZW0YASADKAoyJS5wcm90b2J1Zl91bml0dGVzdC5SYXdNZXNzYWdlU2V0Lkl0" + 
+          "ZW0aKAoESXRlbRIPCgd0eXBlX2lkGAIgAigFEg8KB21lc3NhZ2UYAyACKAxC" + 
+          "RUgBwj5ACiFHb29nbGUuUHJvdG9jb2xCdWZmZXJzLlRlc3RQcm90b3MSG1Vu" + 
+          "aXRUZXN0TWVzc2FnZVNldFByb3RvRmlsZQ==");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_TestMessageSet__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_TestMessageSet__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSet, global::Google.ProtocolBuffers.TestProtos.TestMessageSet.Builder>(internal__static_protobuf_unittest_TestMessageSet__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_TestMessageSetContainer__Descriptor = Descriptor.MessageTypes[1];
+        internal__static_protobuf_unittest_TestMessageSetContainer__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer, global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer.Builder>(internal__static_protobuf_unittest_TestMessageSetContainer__Descriptor,
+                new string[] { "MessageSet", });
+        internal__static_protobuf_unittest_TestMessageSetExtension1__Descriptor = Descriptor.MessageTypes[2];
+        internal__static_protobuf_unittest_TestMessageSetExtension1__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.Builder>(internal__static_protobuf_unittest_TestMessageSetExtension1__Descriptor,
+                new string[] { "I", });
+        global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.MessageSetExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.Descriptor.Extensions[0]);
+        internal__static_protobuf_unittest_TestMessageSetExtension2__Descriptor = Descriptor.MessageTypes[3];
+        internal__static_protobuf_unittest_TestMessageSetExtension2__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.Builder>(internal__static_protobuf_unittest_TestMessageSetExtension2__Descriptor,
+                new string[] { "Str", });
+        global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.MessageSetExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.Descriptor.Extensions[0]);
+        internal__static_protobuf_unittest_RawMessageSet__Descriptor = Descriptor.MessageTypes[4];
+        internal__static_protobuf_unittest_RawMessageSet__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Builder>(internal__static_protobuf_unittest_RawMessageSet__Descriptor,
+                new string[] { "Item", });
+        internal__static_protobuf_unittest_RawMessageSet_Item__Descriptor = internal__static_protobuf_unittest_RawMessageSet__Descriptor.NestedTypes[0];
+        internal__static_protobuf_unittest_RawMessageSet_Item__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item.Builder>(internal__static_protobuf_unittest_RawMessageSet_Item__Descriptor,
+                new string[] { "TypeId", "Message", });
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
           global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
-        });
+          }, assigner);
+    }
     #endregion
     
-    #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSet__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSet, global::Google.ProtocolBuffers.TestProtos.TestMessageSet.Builder> internal__static_protobuf_unittest_TestMessageSet__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSet, global::Google.ProtocolBuffers.TestProtos.TestMessageSet.Builder>(internal__static_protobuf_unittest_TestMessageSet__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSetContainer__Descriptor
-        = Descriptor.MessageTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer, global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer.Builder> internal__static_protobuf_unittest_TestMessageSetContainer__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer, global::Google.ProtocolBuffers.TestProtos.TestMessageSetContainer.Builder>(internal__static_protobuf_unittest_TestMessageSetContainer__Descriptor,
-            new string[] { "MessageSet", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSetExtension1__Descriptor
-        = Descriptor.MessageTypes[2];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.Builder> internal__static_protobuf_unittest_TestMessageSetExtension1__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1.Builder>(internal__static_protobuf_unittest_TestMessageSetExtension1__Descriptor,
-            new string[] { "I", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMessageSetExtension2__Descriptor
-        = Descriptor.MessageTypes[3];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.Builder> internal__static_protobuf_unittest_TestMessageSetExtension2__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2, global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2.Builder>(internal__static_protobuf_unittest_TestMessageSetExtension2__Descriptor,
-            new string[] { "Str", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_RawMessageSet__Descriptor
-        = Descriptor.MessageTypes[4];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Builder> internal__static_protobuf_unittest_RawMessageSet__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Builder>(internal__static_protobuf_unittest_RawMessageSet__Descriptor,
-            new string[] { "Item", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_RawMessageSet_Item__Descriptor
-        = internal__static_protobuf_unittest_RawMessageSet__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item.Builder> internal__static_protobuf_unittest_RawMessageSet_Item__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item, global::Google.ProtocolBuffers.TestProtos.RawMessageSet.Types.Item.Builder>(internal__static_protobuf_unittest_RawMessageSet_Item__Descriptor,
-            new string[] { "TypeId", "Message", });
-    #endregion
   }
   #region Messages
   public sealed partial class TestMessageSet : pb::ExtendableMessage<TestMessageSet, TestMessageSet.Builder> {
@@ -242,6 +267,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static TestMessageSet() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestMessageSetProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestMessageSetContainer : pb::GeneratedMessage<TestMessageSetContainer, TestMessageSetContainer.Builder> {
@@ -476,6 +504,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestMessageSetContainer() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestMessageSetProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestMessageSetExtension1 : pb::GeneratedMessage<TestMessageSetExtension1, TestMessageSetExtension1.Builder> {
@@ -501,8 +532,7 @@ namespace Google.ProtocolBuffers.TestProtos {
     }
     
     public const int MessageSetExtensionFieldNumber = 1545008;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1> MessageSetExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1>.CreateInstance(Descriptor.Extensions[0]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension1> MessageSetExtension;
     public const int IFieldNumber = 15;
     private bool hasI;
     private int i_ = 0;
@@ -690,6 +720,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestMessageSetExtension1() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestMessageSetProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestMessageSetExtension2 : pb::GeneratedMessage<TestMessageSetExtension2, TestMessageSetExtension2.Builder> {
@@ -715,8 +748,7 @@ namespace Google.ProtocolBuffers.TestProtos {
     }
     
     public const int MessageSetExtensionFieldNumber = 1547769;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2> MessageSetExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2>.CreateInstance(Descriptor.Extensions[0]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestMessageSetExtension2> MessageSetExtension;
     public const int StrFieldNumber = 25;
     private bool hasStr;
     private string str_ = "";
@@ -905,6 +937,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestMessageSetExtension2() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestMessageSetProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class RawMessageSet : pb::GeneratedMessage<RawMessageSet, RawMessageSet.Builder> {
@@ -1184,6 +1219,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static Item() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestMessageSetProtoFile.Descriptor;
+        }
       }
       
     }
@@ -1401,6 +1439,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static RawMessageSet() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestMessageSetProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestOptimizeForProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestOptimizeForProtoFile.cs
index 0e4c1afd..4b5eb7c8 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestOptimizeForProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestOptimizeForProtoFile.cs
@@ -8,49 +8,72 @@ namespace Google.ProtocolBuffers.TestProtos {
   
   public static partial class UnitTestOptimizeForProtoFile {
   
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.TestExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.TestExtension2);
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestOptimizedForSize__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.Builder> internal__static_protobuf_unittest_TestOptimizedForSize__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestRequiredOptimizedForSize__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize.Builder> internal__static_protobuf_unittest_TestRequiredOptimizedForSize__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestOptionalOptimizedForSize__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize.Builder> internal__static_protobuf_unittest_TestOptionalOptimizedForSize__FieldAccessorTable;
+    #endregion
     #region Descriptor
     public static pbd::FileDescriptor Descriptor {
       get { return descriptor; }
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "Citnb29nbGUvcHJvdG9idWYvdW5pdHRlc3Rfb3B0aW1pemVfZm9yLnByb3Rv" + 
-        "EhFwcm90b2J1Zl91bml0dGVzdBokZ29vZ2xlL3Byb3RvYnVmL2NzaGFycF9v" + 
-        "cHRpb25zLnByb3RvGh5nb29nbGUvcHJvdG9idWYvdW5pdHRlc3QucHJvdG8i" + 
-        "kgIKFFRlc3RPcHRpbWl6ZWRGb3JTaXplEgkKAWkYASABKAUSLgoDbXNnGBMg" + 
-        "ASgLMiEucHJvdG9idWZfdW5pdHRlc3QuRm9yZWlnbk1lc3NhZ2UqCQjoBxCA" + 
-        "gICAAjJACg50ZXN0X2V4dGVuc2lvbhInLnByb3RvYnVmX3VuaXR0ZXN0LlRl" + 
-        "c3RPcHRpbWl6ZWRGb3JTaXplGNIJIAEoBTJyCg90ZXN0X2V4dGVuc2lvbjIS" + 
-        "Jy5wcm90b2J1Zl91bml0dGVzdC5UZXN0T3B0aW1pemVkRm9yU2l6ZRjTCSAB" + 
-        "KAsyLy5wcm90b2J1Zl91bml0dGVzdC5UZXN0UmVxdWlyZWRPcHRpbWl6ZWRG" + 
-        "b3JTaXplIikKHFRlc3RSZXF1aXJlZE9wdGltaXplZEZvclNpemUSCQoBeBgB" + 
-        "IAIoBSJaChxUZXN0T3B0aW9uYWxPcHRpbWl6ZWRGb3JTaXplEjoKAW8YASAB" + 
-        "KAsyLy5wcm90b2J1Zl91bml0dGVzdC5UZXN0UmVxdWlyZWRPcHRpbWl6ZWRG" + 
-        "b3JTaXplQkZIAsI+QQohR29vZ2xlLlByb3RvY29sQnVmZmVycy5UZXN0UHJv" + 
-        "dG9zEhxVbml0VGVzdE9wdGltaXplRm9yUHJvdG9GaWxl"),
-        new pbd::FileDescriptor[] {
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestOptimizeForProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "Citnb29nbGUvcHJvdG9idWYvdW5pdHRlc3Rfb3B0aW1pemVfZm9yLnByb3Rv" + 
+          "EhFwcm90b2J1Zl91bml0dGVzdBokZ29vZ2xlL3Byb3RvYnVmL2NzaGFycF9v" + 
+          "cHRpb25zLnByb3RvGh5nb29nbGUvcHJvdG9idWYvdW5pdHRlc3QucHJvdG8i" + 
+          "kgIKFFRlc3RPcHRpbWl6ZWRGb3JTaXplEgkKAWkYASABKAUSLgoDbXNnGBMg" + 
+          "ASgLMiEucHJvdG9idWZfdW5pdHRlc3QuRm9yZWlnbk1lc3NhZ2UqCQjoBxCA" + 
+          "gICAAjJACg50ZXN0X2V4dGVuc2lvbhInLnByb3RvYnVmX3VuaXR0ZXN0LlRl" + 
+          "c3RPcHRpbWl6ZWRGb3JTaXplGNIJIAEoBTJyCg90ZXN0X2V4dGVuc2lvbjIS" + 
+          "Jy5wcm90b2J1Zl91bml0dGVzdC5UZXN0T3B0aW1pemVkRm9yU2l6ZRjTCSAB" + 
+          "KAsyLy5wcm90b2J1Zl91bml0dGVzdC5UZXN0UmVxdWlyZWRPcHRpbWl6ZWRG" + 
+          "b3JTaXplIikKHFRlc3RSZXF1aXJlZE9wdGltaXplZEZvclNpemUSCQoBeBgB" + 
+          "IAIoBSJaChxUZXN0T3B0aW9uYWxPcHRpbWl6ZWRGb3JTaXplEjoKAW8YASAB" + 
+          "KAsyLy5wcm90b2J1Zl91bml0dGVzdC5UZXN0UmVxdWlyZWRPcHRpbWl6ZWRG" + 
+          "b3JTaXplQkZIAsI+QQohR29vZ2xlLlByb3RvY29sQnVmZmVycy5UZXN0UHJv" + 
+          "dG9zEhxVbml0VGVzdE9wdGltaXplRm9yUHJvdG9GaWxl");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_TestOptimizedForSize__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_TestOptimizedForSize__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestOptimizedForSize__Descriptor,
+                new string[] { "I", "Msg", });
+        global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.TestExtension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.Descriptor.Extensions[0]);
+        global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.TestExtension2 = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.Descriptor.Extensions[1]);
+        internal__static_protobuf_unittest_TestRequiredOptimizedForSize__Descriptor = Descriptor.MessageTypes[1];
+        internal__static_protobuf_unittest_TestRequiredOptimizedForSize__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestRequiredOptimizedForSize__Descriptor,
+                new string[] { "X", });
+        internal__static_protobuf_unittest_TestOptionalOptimizedForSize__Descriptor = Descriptor.MessageTypes[2];
+        internal__static_protobuf_unittest_TestOptionalOptimizedForSize__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestOptionalOptimizedForSize__Descriptor,
+                new string[] { "O", });
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
           global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
           global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor, 
-        });
+          }, assigner);
+    }
     #endregion
     
-    #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestOptimizedForSize__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.Builder> internal__static_protobuf_unittest_TestOptimizedForSize__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestOptimizedForSize__Descriptor,
-            new string[] { "I", "Msg", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestRequiredOptimizedForSize__Descriptor
-        = Descriptor.MessageTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize.Builder> internal__static_protobuf_unittest_TestRequiredOptimizedForSize__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestRequiredOptimizedForSize__Descriptor,
-            new string[] { "X", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestOptionalOptimizedForSize__Descriptor
-        = Descriptor.MessageTypes[2];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize.Builder> internal__static_protobuf_unittest_TestOptionalOptimizedForSize__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize, global::Google.ProtocolBuffers.TestProtos.TestOptionalOptimizedForSize.Builder>(internal__static_protobuf_unittest_TestOptionalOptimizedForSize__Descriptor,
-            new string[] { "O", });
-    #endregion
   }
   #region Messages
   public sealed partial class TestOptimizedForSize : pb::ExtendableMessage<TestOptimizedForSize, TestOptimizedForSize.Builder> {
@@ -76,11 +99,9 @@ namespace Google.ProtocolBuffers.TestProtos {
     }
     
     public const int TestExtensionFieldNumber = 1234;
-    public static readonly pb::GeneratedExtensionBase<int> TestExtension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[0]);
+    public static pb::GeneratedExtensionBase<int> TestExtension;
     public const int TestExtension2FieldNumber = 1235;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize> TestExtension2 =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize>.CreateInstance(Descriptor.Extensions[1]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestRequiredOptimizedForSize> TestExtension2;
     public const int IFieldNumber = 1;
     private bool hasI;
     private int i_ = 0;
@@ -231,6 +252,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestOptimizedForSize() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestOptimizeForProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestRequiredOptimizedForSize : pb::GeneratedMessage<TestRequiredOptimizedForSize, TestRequiredOptimizedForSize.Builder> {
@@ -359,6 +383,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestRequiredOptimizedForSize() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestOptimizeForProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestOptionalOptimizedForSize : pb::GeneratedMessage<TestOptionalOptimizedForSize, TestOptionalOptimizedForSize.Builder> {
@@ -505,6 +532,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestOptionalOptimizedForSize() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestOptimizeForProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestProtoFile.cs
index 8a94d2da..bf9b83cd 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestProtoFile.cs
@@ -8,776 +8,873 @@ namespace Google.ProtocolBuffers.TestProtos {
   
   public static partial class UnitTestProtoFile {
   
-    #region Descriptor
-    public static pbd::FileDescriptor Descriptor {
-      get { return descriptor; }
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalInt32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalInt64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalUint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalUint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalFixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalFixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSfixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSfixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalFloatExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalDoubleExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalBoolExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalStringExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalBytesExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalGroupExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalNestedMessageExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalForeignMessageExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalImportMessageExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalNestedEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalForeignEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalImportEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalStringPieceExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalCordExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedInt32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedInt64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedUint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedUint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedFixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedFixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSfixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSfixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedFloatExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedDoubleExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedBoolExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedStringExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedBytesExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedGroupExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedNestedMessageExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedForeignMessageExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedImportMessageExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedNestedEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedForeignEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedImportEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedStringPieceExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedCordExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultInt32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultInt64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultUint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultUint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultFixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultFixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSfixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSfixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultFloatExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultDoubleExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultBoolExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultStringExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultBytesExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultNestedEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultForeignEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultImportEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultStringPieceExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultCordExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.MyExtensionString);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.MyExtensionInt);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedInt32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedInt64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedUint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedUint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSint32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSint64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedFixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedFixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSfixed32Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSfixed64Extension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedFloatExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedDoubleExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedBoolExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedEnumExtension);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.TestRequired.Single);
+      registry.Add(global::Google.ProtocolBuffers.TestProtos.TestRequired.Multi);
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "Ch5nb29nbGUvcHJvdG9idWYvdW5pdHRlc3QucHJvdG8SEXByb3RvYnVmX3Vu" + 
-        "aXR0ZXN0GiRnb29nbGUvcHJvdG9idWYvY3NoYXJwX29wdGlvbnMucHJvdG8a" + 
-        "JWdvb2dsZS9wcm90b2J1Zi91bml0dGVzdF9pbXBvcnQucHJvdG8iuxUKDFRl" + 
-        "c3RBbGxUeXBlcxIWCg5vcHRpb25hbF9pbnQzMhgBIAEoBRIWCg5vcHRpb25h" + 
-        "bF9pbnQ2NBgCIAEoAxIXCg9vcHRpb25hbF91aW50MzIYAyABKA0SFwoPb3B0" + 
-        "aW9uYWxfdWludDY0GAQgASgEEhcKD29wdGlvbmFsX3NpbnQzMhgFIAEoERIX" + 
-        "Cg9vcHRpb25hbF9zaW50NjQYBiABKBISGAoQb3B0aW9uYWxfZml4ZWQzMhgH" + 
-        "IAEoBxIYChBvcHRpb25hbF9maXhlZDY0GAggASgGEhkKEW9wdGlvbmFsX3Nm" + 
-        "aXhlZDMyGAkgASgPEhkKEW9wdGlvbmFsX3NmaXhlZDY0GAogASgQEhYKDm9w" + 
-        "dGlvbmFsX2Zsb2F0GAsgASgCEhcKD29wdGlvbmFsX2RvdWJsZRgMIAEoARIV" + 
-        "Cg1vcHRpb25hbF9ib29sGA0gASgIEhcKD29wdGlvbmFsX3N0cmluZxgOIAEo" + 
-        "CRIWCg5vcHRpb25hbF9ieXRlcxgPIAEoDBJECg1vcHRpb25hbGdyb3VwGBAg" + 
-        "ASgKMi0ucHJvdG9idWZfdW5pdHRlc3QuVGVzdEFsbFR5cGVzLk9wdGlvbmFs" + 
-        "R3JvdXASTgoXb3B0aW9uYWxfbmVzdGVkX21lc3NhZ2UYEiABKAsyLS5wcm90" + 
-        "b2J1Zl91bml0dGVzdC5UZXN0QWxsVHlwZXMuTmVzdGVkTWVzc2FnZRJDChhv" + 
-        "cHRpb25hbF9mb3JlaWduX21lc3NhZ2UYEyABKAsyIS5wcm90b2J1Zl91bml0" + 
-        "dGVzdC5Gb3JlaWduTWVzc2FnZRJIChdvcHRpb25hbF9pbXBvcnRfbWVzc2Fn" + 
-        "ZRgUIAEoCzInLnByb3RvYnVmX3VuaXR0ZXN0X2ltcG9ydC5JbXBvcnRNZXNz" + 
-        "YWdlEkgKFG9wdGlvbmFsX25lc3RlZF9lbnVtGBUgASgOMioucHJvdG9idWZf" + 
-        "dW5pdHRlc3QuVGVzdEFsbFR5cGVzLk5lc3RlZEVudW0SPQoVb3B0aW9uYWxf" + 
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-        "bGU="),
-        new pbd::FileDescriptor[] {
-          global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
-          global::Google.ProtocolBuffers.TestProtos.UnitTestImportProtoFile.Descriptor, 
-        });
     #endregion
-    
     #region Extensions
     public const int OptionalInt32ExtensionFieldNumber = 1;
-    public static readonly pb::GeneratedExtensionBase<int> OptionalInt32Extension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[0]);
+    public static pb::GeneratedExtensionBase<int> OptionalInt32Extension;
     public const int OptionalInt64ExtensionFieldNumber = 2;
-    public static readonly pb::GeneratedExtensionBase<long> OptionalInt64Extension =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[1]);
+    public static pb::GeneratedExtensionBase<long> OptionalInt64Extension;
     public const int OptionalUint32ExtensionFieldNumber = 3;
-    public static readonly pb::GeneratedExtensionBase<uint> OptionalUint32Extension =
-        pb::GeneratedSingleExtension<uint>.CreateInstance(Descriptor.Extensions[2]);
+    public static pb::GeneratedExtensionBase<uint> OptionalUint32Extension;
     public const int OptionalUint64ExtensionFieldNumber = 4;
-    public static readonly pb::GeneratedExtensionBase<ulong> OptionalUint64Extension =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[3]);
+    public static pb::GeneratedExtensionBase<ulong> OptionalUint64Extension;
     public const int OptionalSint32ExtensionFieldNumber = 5;
-    public static readonly pb::GeneratedExtensionBase<int> OptionalSint32Extension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[4]);
+    public static pb::GeneratedExtensionBase<int> OptionalSint32Extension;
     public const int OptionalSint64ExtensionFieldNumber = 6;
-    public static readonly pb::GeneratedExtensionBase<long> OptionalSint64Extension =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[5]);
+    public static pb::GeneratedExtensionBase<long> OptionalSint64Extension;
     public const int OptionalFixed32ExtensionFieldNumber = 7;
-    public static readonly pb::GeneratedExtensionBase<uint> OptionalFixed32Extension =
-        pb::GeneratedSingleExtension<uint>.CreateInstance(Descriptor.Extensions[6]);
+    public static pb::GeneratedExtensionBase<uint> OptionalFixed32Extension;
     public const int OptionalFixed64ExtensionFieldNumber = 8;
-    public static readonly pb::GeneratedExtensionBase<ulong> OptionalFixed64Extension =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[7]);
+    public static pb::GeneratedExtensionBase<ulong> OptionalFixed64Extension;
     public const int OptionalSfixed32ExtensionFieldNumber = 9;
-    public static readonly pb::GeneratedExtensionBase<int> OptionalSfixed32Extension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[8]);
+    public static pb::GeneratedExtensionBase<int> OptionalSfixed32Extension;
     public const int OptionalSfixed64ExtensionFieldNumber = 10;
-    public static readonly pb::GeneratedExtensionBase<long> OptionalSfixed64Extension =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[9]);
+    public static pb::GeneratedExtensionBase<long> OptionalSfixed64Extension;
     public const int OptionalFloatExtensionFieldNumber = 11;
-    public static readonly pb::GeneratedExtensionBase<float> OptionalFloatExtension =
-        pb::GeneratedSingleExtension<float>.CreateInstance(Descriptor.Extensions[10]);
+    public static pb::GeneratedExtensionBase<float> OptionalFloatExtension;
     public const int OptionalDoubleExtensionFieldNumber = 12;
-    public static readonly pb::GeneratedExtensionBase<double> OptionalDoubleExtension =
-        pb::GeneratedSingleExtension<double>.CreateInstance(Descriptor.Extensions[11]);
+    public static pb::GeneratedExtensionBase<double> OptionalDoubleExtension;
     public const int OptionalBoolExtensionFieldNumber = 13;
-    public static readonly pb::GeneratedExtensionBase<bool> OptionalBoolExtension =
-        pb::GeneratedSingleExtension<bool>.CreateInstance(Descriptor.Extensions[12]);
+    public static pb::GeneratedExtensionBase<bool> OptionalBoolExtension;
     public const int OptionalStringExtensionFieldNumber = 14;
-    public static readonly pb::GeneratedExtensionBase<string> OptionalStringExtension =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[13]);
+    public static pb::GeneratedExtensionBase<string> OptionalStringExtension;
     public const int OptionalBytesExtensionFieldNumber = 15;
-    public static readonly pb::GeneratedExtensionBase<pb::ByteString> OptionalBytesExtension =
-        pb::GeneratedSingleExtension<pb::ByteString>.CreateInstance(Descriptor.Extensions[14]);
+    public static pb::GeneratedExtensionBase<pb::ByteString> OptionalBytesExtension;
     public const int OptionalGroupExtensionFieldNumber = 16;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension> OptionalGroupExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension>.CreateInstance(Descriptor.Extensions[15]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension> OptionalGroupExtension;
     public const int OptionalNestedMessageExtensionFieldNumber = 18;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage> OptionalNestedMessageExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage>.CreateInstance(Descriptor.Extensions[16]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage> OptionalNestedMessageExtension;
     public const int OptionalForeignMessageExtensionFieldNumber = 19;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ForeignMessage> OptionalForeignMessageExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ForeignMessage>.CreateInstance(Descriptor.Extensions[17]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ForeignMessage> OptionalForeignMessageExtension;
     public const int OptionalImportMessageExtensionFieldNumber = 20;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ImportMessage> OptionalImportMessageExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ImportMessage>.CreateInstance(Descriptor.Extensions[18]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ImportMessage> OptionalImportMessageExtension;
     public const int OptionalNestedEnumExtensionFieldNumber = 21;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum> OptionalNestedEnumExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>.CreateInstance(Descriptor.Extensions[19]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum> OptionalNestedEnumExtension;
     public const int OptionalForeignEnumExtensionFieldNumber = 22;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ForeignEnum> OptionalForeignEnumExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(Descriptor.Extensions[20]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ForeignEnum> OptionalForeignEnumExtension;
     public const int OptionalImportEnumExtensionFieldNumber = 23;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ImportEnum> OptionalImportEnumExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ImportEnum>.CreateInstance(Descriptor.Extensions[21]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ImportEnum> OptionalImportEnumExtension;
     public const int OptionalStringPieceExtensionFieldNumber = 24;
-    public static readonly pb::GeneratedExtensionBase<string> OptionalStringPieceExtension =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[22]);
+    public static pb::GeneratedExtensionBase<string> OptionalStringPieceExtension;
     public const int OptionalCordExtensionFieldNumber = 25;
-    public static readonly pb::GeneratedExtensionBase<string> OptionalCordExtension =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[23]);
+    public static pb::GeneratedExtensionBase<string> OptionalCordExtension;
     public const int RepeatedInt32ExtensionFieldNumber = 31;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<int>> RepeatedInt32Extension =
-        pb::GeneratedRepeatExtension<int>.CreateInstance(Descriptor.Extensions[24]);
+    public static pb::GeneratedExtensionBase<scg::IList<int>> RepeatedInt32Extension;
     public const int RepeatedInt64ExtensionFieldNumber = 32;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<long>> RepeatedInt64Extension =
-        pb::GeneratedRepeatExtension<long>.CreateInstance(Descriptor.Extensions[25]);
+    public static pb::GeneratedExtensionBase<scg::IList<long>> RepeatedInt64Extension;
     public const int RepeatedUint32ExtensionFieldNumber = 33;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<uint>> RepeatedUint32Extension =
-        pb::GeneratedRepeatExtension<uint>.CreateInstance(Descriptor.Extensions[26]);
+    public static pb::GeneratedExtensionBase<scg::IList<uint>> RepeatedUint32Extension;
     public const int RepeatedUint64ExtensionFieldNumber = 34;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<ulong>> RepeatedUint64Extension =
-        pb::GeneratedRepeatExtension<ulong>.CreateInstance(Descriptor.Extensions[27]);
+    public static pb::GeneratedExtensionBase<scg::IList<ulong>> RepeatedUint64Extension;
     public const int RepeatedSint32ExtensionFieldNumber = 35;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<int>> RepeatedSint32Extension =
-        pb::GeneratedRepeatExtension<int>.CreateInstance(Descriptor.Extensions[28]);
+    public static pb::GeneratedExtensionBase<scg::IList<int>> RepeatedSint32Extension;
     public const int RepeatedSint64ExtensionFieldNumber = 36;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<long>> RepeatedSint64Extension =
-        pb::GeneratedRepeatExtension<long>.CreateInstance(Descriptor.Extensions[29]);
+    public static pb::GeneratedExtensionBase<scg::IList<long>> RepeatedSint64Extension;
     public const int RepeatedFixed32ExtensionFieldNumber = 37;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<uint>> RepeatedFixed32Extension =
-        pb::GeneratedRepeatExtension<uint>.CreateInstance(Descriptor.Extensions[30]);
+    public static pb::GeneratedExtensionBase<scg::IList<uint>> RepeatedFixed32Extension;
     public const int RepeatedFixed64ExtensionFieldNumber = 38;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<ulong>> RepeatedFixed64Extension =
-        pb::GeneratedRepeatExtension<ulong>.CreateInstance(Descriptor.Extensions[31]);
+    public static pb::GeneratedExtensionBase<scg::IList<ulong>> RepeatedFixed64Extension;
     public const int RepeatedSfixed32ExtensionFieldNumber = 39;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<int>> RepeatedSfixed32Extension =
-        pb::GeneratedRepeatExtension<int>.CreateInstance(Descriptor.Extensions[32]);
+    public static pb::GeneratedExtensionBase<scg::IList<int>> RepeatedSfixed32Extension;
     public const int RepeatedSfixed64ExtensionFieldNumber = 40;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<long>> RepeatedSfixed64Extension =
-        pb::GeneratedRepeatExtension<long>.CreateInstance(Descriptor.Extensions[33]);
+    public static pb::GeneratedExtensionBase<scg::IList<long>> RepeatedSfixed64Extension;
     public const int RepeatedFloatExtensionFieldNumber = 41;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<float>> RepeatedFloatExtension =
-        pb::GeneratedRepeatExtension<float>.CreateInstance(Descriptor.Extensions[34]);
+    public static pb::GeneratedExtensionBase<scg::IList<float>> RepeatedFloatExtension;
     public const int RepeatedDoubleExtensionFieldNumber = 42;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<double>> RepeatedDoubleExtension =
-        pb::GeneratedRepeatExtension<double>.CreateInstance(Descriptor.Extensions[35]);
+    public static pb::GeneratedExtensionBase<scg::IList<double>> RepeatedDoubleExtension;
     public const int RepeatedBoolExtensionFieldNumber = 43;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<bool>> RepeatedBoolExtension =
-        pb::GeneratedRepeatExtension<bool>.CreateInstance(Descriptor.Extensions[36]);
+    public static pb::GeneratedExtensionBase<scg::IList<bool>> RepeatedBoolExtension;
     public const int RepeatedStringExtensionFieldNumber = 44;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<string>> RepeatedStringExtension =
-        pb::GeneratedRepeatExtension<string>.CreateInstance(Descriptor.Extensions[37]);
+    public static pb::GeneratedExtensionBase<scg::IList<string>> RepeatedStringExtension;
     public const int RepeatedBytesExtensionFieldNumber = 45;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<pb::ByteString>> RepeatedBytesExtension =
-        pb::GeneratedRepeatExtension<pb::ByteString>.CreateInstance(Descriptor.Extensions[38]);
+    public static pb::GeneratedExtensionBase<scg::IList<pb::ByteString>> RepeatedBytesExtension;
     public const int RepeatedGroupExtensionFieldNumber = 46;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension>> RepeatedGroupExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension>.CreateInstance(Descriptor.Extensions[39]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension>> RepeatedGroupExtension;
     public const int RepeatedNestedMessageExtensionFieldNumber = 48;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage>> RepeatedNestedMessageExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage>.CreateInstance(Descriptor.Extensions[40]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage>> RepeatedNestedMessageExtension;
     public const int RepeatedForeignMessageExtensionFieldNumber = 49;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ForeignMessage>> RepeatedForeignMessageExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ForeignMessage>.CreateInstance(Descriptor.Extensions[41]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ForeignMessage>> RepeatedForeignMessageExtension;
     public const int RepeatedImportMessageExtensionFieldNumber = 50;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ImportMessage>> RepeatedImportMessageExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ImportMessage>.CreateInstance(Descriptor.Extensions[42]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ImportMessage>> RepeatedImportMessageExtension;
     public const int RepeatedNestedEnumExtensionFieldNumber = 51;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>> RepeatedNestedEnumExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>.CreateInstance(Descriptor.Extensions[43]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>> RepeatedNestedEnumExtension;
     public const int RepeatedForeignEnumExtensionFieldNumber = 52;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>> RepeatedForeignEnumExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(Descriptor.Extensions[44]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>> RepeatedForeignEnumExtension;
     public const int RepeatedImportEnumExtensionFieldNumber = 53;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ImportEnum>> RepeatedImportEnumExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ImportEnum>.CreateInstance(Descriptor.Extensions[45]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ImportEnum>> RepeatedImportEnumExtension;
     public const int RepeatedStringPieceExtensionFieldNumber = 54;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<string>> RepeatedStringPieceExtension =
-        pb::GeneratedRepeatExtension<string>.CreateInstance(Descriptor.Extensions[46]);
+    public static pb::GeneratedExtensionBase<scg::IList<string>> RepeatedStringPieceExtension;
     public const int RepeatedCordExtensionFieldNumber = 55;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<string>> RepeatedCordExtension =
-        pb::GeneratedRepeatExtension<string>.CreateInstance(Descriptor.Extensions[47]);
+    public static pb::GeneratedExtensionBase<scg::IList<string>> RepeatedCordExtension;
     public const int DefaultInt32ExtensionFieldNumber = 61;
-    public static readonly pb::GeneratedExtensionBase<int> DefaultInt32Extension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[48]);
+    public static pb::GeneratedExtensionBase<int> DefaultInt32Extension;
     public const int DefaultInt64ExtensionFieldNumber = 62;
-    public static readonly pb::GeneratedExtensionBase<long> DefaultInt64Extension =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[49]);
+    public static pb::GeneratedExtensionBase<long> DefaultInt64Extension;
     public const int DefaultUint32ExtensionFieldNumber = 63;
-    public static readonly pb::GeneratedExtensionBase<uint> DefaultUint32Extension =
-        pb::GeneratedSingleExtension<uint>.CreateInstance(Descriptor.Extensions[50]);
+    public static pb::GeneratedExtensionBase<uint> DefaultUint32Extension;
     public const int DefaultUint64ExtensionFieldNumber = 64;
-    public static readonly pb::GeneratedExtensionBase<ulong> DefaultUint64Extension =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[51]);
+    public static pb::GeneratedExtensionBase<ulong> DefaultUint64Extension;
     public const int DefaultSint32ExtensionFieldNumber = 65;
-    public static readonly pb::GeneratedExtensionBase<int> DefaultSint32Extension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[52]);
+    public static pb::GeneratedExtensionBase<int> DefaultSint32Extension;
     public const int DefaultSint64ExtensionFieldNumber = 66;
-    public static readonly pb::GeneratedExtensionBase<long> DefaultSint64Extension =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[53]);
+    public static pb::GeneratedExtensionBase<long> DefaultSint64Extension;
     public const int DefaultFixed32ExtensionFieldNumber = 67;
-    public static readonly pb::GeneratedExtensionBase<uint> DefaultFixed32Extension =
-        pb::GeneratedSingleExtension<uint>.CreateInstance(Descriptor.Extensions[54]);
+    public static pb::GeneratedExtensionBase<uint> DefaultFixed32Extension;
     public const int DefaultFixed64ExtensionFieldNumber = 68;
-    public static readonly pb::GeneratedExtensionBase<ulong> DefaultFixed64Extension =
-        pb::GeneratedSingleExtension<ulong>.CreateInstance(Descriptor.Extensions[55]);
+    public static pb::GeneratedExtensionBase<ulong> DefaultFixed64Extension;
     public const int DefaultSfixed32ExtensionFieldNumber = 69;
-    public static readonly pb::GeneratedExtensionBase<int> DefaultSfixed32Extension =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[56]);
+    public static pb::GeneratedExtensionBase<int> DefaultSfixed32Extension;
     public const int DefaultSfixed64ExtensionFieldNumber = 70;
-    public static readonly pb::GeneratedExtensionBase<long> DefaultSfixed64Extension =
-        pb::GeneratedSingleExtension<long>.CreateInstance(Descriptor.Extensions[57]);
+    public static pb::GeneratedExtensionBase<long> DefaultSfixed64Extension;
     public const int DefaultFloatExtensionFieldNumber = 71;
-    public static readonly pb::GeneratedExtensionBase<float> DefaultFloatExtension =
-        pb::GeneratedSingleExtension<float>.CreateInstance(Descriptor.Extensions[58]);
+    public static pb::GeneratedExtensionBase<float> DefaultFloatExtension;
     public const int DefaultDoubleExtensionFieldNumber = 72;
-    public static readonly pb::GeneratedExtensionBase<double> DefaultDoubleExtension =
-        pb::GeneratedSingleExtension<double>.CreateInstance(Descriptor.Extensions[59]);
+    public static pb::GeneratedExtensionBase<double> DefaultDoubleExtension;
     public const int DefaultBoolExtensionFieldNumber = 73;
-    public static readonly pb::GeneratedExtensionBase<bool> DefaultBoolExtension =
-        pb::GeneratedSingleExtension<bool>.CreateInstance(Descriptor.Extensions[60]);
+    public static pb::GeneratedExtensionBase<bool> DefaultBoolExtension;
     public const int DefaultStringExtensionFieldNumber = 74;
-    public static readonly pb::GeneratedExtensionBase<string> DefaultStringExtension =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[61]);
+    public static pb::GeneratedExtensionBase<string> DefaultStringExtension;
     public const int DefaultBytesExtensionFieldNumber = 75;
-    public static readonly pb::GeneratedExtensionBase<pb::ByteString> DefaultBytesExtension =
-        pb::GeneratedSingleExtension<pb::ByteString>.CreateInstance(Descriptor.Extensions[62]);
+    public static pb::GeneratedExtensionBase<pb::ByteString> DefaultBytesExtension;
     public const int DefaultNestedEnumExtensionFieldNumber = 81;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum> DefaultNestedEnumExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>.CreateInstance(Descriptor.Extensions[63]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum> DefaultNestedEnumExtension;
     public const int DefaultForeignEnumExtensionFieldNumber = 82;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ForeignEnum> DefaultForeignEnumExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(Descriptor.Extensions[64]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ForeignEnum> DefaultForeignEnumExtension;
     public const int DefaultImportEnumExtensionFieldNumber = 83;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ImportEnum> DefaultImportEnumExtension =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ImportEnum>.CreateInstance(Descriptor.Extensions[65]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.ImportEnum> DefaultImportEnumExtension;
     public const int DefaultStringPieceExtensionFieldNumber = 84;
-    public static readonly pb::GeneratedExtensionBase<string> DefaultStringPieceExtension =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[66]);
+    public static pb::GeneratedExtensionBase<string> DefaultStringPieceExtension;
     public const int DefaultCordExtensionFieldNumber = 85;
-    public static readonly pb::GeneratedExtensionBase<string> DefaultCordExtension =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[67]);
+    public static pb::GeneratedExtensionBase<string> DefaultCordExtension;
     public const int MyExtensionStringFieldNumber = 50;
-    public static readonly pb::GeneratedExtensionBase<string> MyExtensionString =
-        pb::GeneratedSingleExtension<string>.CreateInstance(Descriptor.Extensions[68]);
+    public static pb::GeneratedExtensionBase<string> MyExtensionString;
     public const int MyExtensionIntFieldNumber = 5;
-    public static readonly pb::GeneratedExtensionBase<int> MyExtensionInt =
-        pb::GeneratedSingleExtension<int>.CreateInstance(Descriptor.Extensions[69]);
+    public static pb::GeneratedExtensionBase<int> MyExtensionInt;
     public const int PackedInt32ExtensionFieldNumber = 90;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<int>> PackedInt32Extension =
-        pb::GeneratedRepeatExtension<int>.CreateInstance(Descriptor.Extensions[70]);
+    public static pb::GeneratedExtensionBase<scg::IList<int>> PackedInt32Extension;
     public const int PackedInt64ExtensionFieldNumber = 91;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<long>> PackedInt64Extension =
-        pb::GeneratedRepeatExtension<long>.CreateInstance(Descriptor.Extensions[71]);
+    public static pb::GeneratedExtensionBase<scg::IList<long>> PackedInt64Extension;
     public const int PackedUint32ExtensionFieldNumber = 92;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<uint>> PackedUint32Extension =
-        pb::GeneratedRepeatExtension<uint>.CreateInstance(Descriptor.Extensions[72]);
+    public static pb::GeneratedExtensionBase<scg::IList<uint>> PackedUint32Extension;
     public const int PackedUint64ExtensionFieldNumber = 93;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<ulong>> PackedUint64Extension =
-        pb::GeneratedRepeatExtension<ulong>.CreateInstance(Descriptor.Extensions[73]);
+    public static pb::GeneratedExtensionBase<scg::IList<ulong>> PackedUint64Extension;
     public const int PackedSint32ExtensionFieldNumber = 94;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<int>> PackedSint32Extension =
-        pb::GeneratedRepeatExtension<int>.CreateInstance(Descriptor.Extensions[74]);
+    public static pb::GeneratedExtensionBase<scg::IList<int>> PackedSint32Extension;
     public const int PackedSint64ExtensionFieldNumber = 95;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<long>> PackedSint64Extension =
-        pb::GeneratedRepeatExtension<long>.CreateInstance(Descriptor.Extensions[75]);
+    public static pb::GeneratedExtensionBase<scg::IList<long>> PackedSint64Extension;
     public const int PackedFixed32ExtensionFieldNumber = 96;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<uint>> PackedFixed32Extension =
-        pb::GeneratedRepeatExtension<uint>.CreateInstance(Descriptor.Extensions[76]);
+    public static pb::GeneratedExtensionBase<scg::IList<uint>> PackedFixed32Extension;
     public const int PackedFixed64ExtensionFieldNumber = 97;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<ulong>> PackedFixed64Extension =
-        pb::GeneratedRepeatExtension<ulong>.CreateInstance(Descriptor.Extensions[77]);
+    public static pb::GeneratedExtensionBase<scg::IList<ulong>> PackedFixed64Extension;
     public const int PackedSfixed32ExtensionFieldNumber = 98;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<int>> PackedSfixed32Extension =
-        pb::GeneratedRepeatExtension<int>.CreateInstance(Descriptor.Extensions[78]);
+    public static pb::GeneratedExtensionBase<scg::IList<int>> PackedSfixed32Extension;
     public const int PackedSfixed64ExtensionFieldNumber = 99;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<long>> PackedSfixed64Extension =
-        pb::GeneratedRepeatExtension<long>.CreateInstance(Descriptor.Extensions[79]);
+    public static pb::GeneratedExtensionBase<scg::IList<long>> PackedSfixed64Extension;
     public const int PackedFloatExtensionFieldNumber = 100;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<float>> PackedFloatExtension =
-        pb::GeneratedRepeatExtension<float>.CreateInstance(Descriptor.Extensions[80]);
+    public static pb::GeneratedExtensionBase<scg::IList<float>> PackedFloatExtension;
     public const int PackedDoubleExtensionFieldNumber = 101;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<double>> PackedDoubleExtension =
-        pb::GeneratedRepeatExtension<double>.CreateInstance(Descriptor.Extensions[81]);
+    public static pb::GeneratedExtensionBase<scg::IList<double>> PackedDoubleExtension;
     public const int PackedBoolExtensionFieldNumber = 102;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<bool>> PackedBoolExtension =
-        pb::GeneratedRepeatExtension<bool>.CreateInstance(Descriptor.Extensions[82]);
+    public static pb::GeneratedExtensionBase<scg::IList<bool>> PackedBoolExtension;
     public const int PackedEnumExtensionFieldNumber = 103;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>> PackedEnumExtension =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(Descriptor.Extensions[83]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>> PackedEnumExtension;
     #endregion
     
     #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Builder> internal__static_protobuf_unittest_TestAllTypes__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Builder>(internal__static_protobuf_unittest_TestAllTypes__Descriptor,
-            new string[] { "OptionalInt32", "OptionalInt64", "OptionalUint32", "OptionalUint64", "OptionalSint32", "OptionalSint64", "OptionalFixed32", "OptionalFixed64", "OptionalSfixed32", "OptionalSfixed64", "OptionalFloat", "OptionalDouble", "OptionalBool", "OptionalString", "OptionalBytes", "OptionalGroup", "OptionalNestedMessage", "OptionalForeignMessage", "OptionalImportMessage", "OptionalNestedEnum", "OptionalForeignEnum", "OptionalImportEnum", "OptionalStringPiece", "OptionalCord", "RepeatedInt32", "RepeatedInt64", "RepeatedUint32", "RepeatedUint64", "RepeatedSint32", "RepeatedSint64", "RepeatedFixed32", "RepeatedFixed64", "RepeatedSfixed32", "RepeatedSfixed64", "RepeatedFloat", "RepeatedDouble", "RepeatedBool", "RepeatedString", "RepeatedBytes", "RepeatedGroup", "RepeatedNestedMessage", "RepeatedForeignMessage", "RepeatedImportMessage", "RepeatedNestedEnum", "RepeatedForeignEnum", "RepeatedImportEnum", "RepeatedStringPiece", "RepeatedCord", "DefaultInt32", "DefaultInt64", "DefaultUint32", "DefaultUint64", "DefaultSint32", "DefaultSint64", "DefaultFixed32", "DefaultFixed64", "DefaultSfixed32", "DefaultSfixed64", "DefaultFloat", "DefaultDouble", "DefaultBool", "DefaultString", "DefaultBytes", "DefaultNestedEnum", "DefaultForeignEnum", "DefaultImportEnum", "DefaultStringPiece", "DefaultCord", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes_NestedMessage__Descriptor
-        = internal__static_protobuf_unittest_TestAllTypes__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage.Builder> internal__static_protobuf_unittest_TestAllTypes_NestedMessage__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage.Builder>(internal__static_protobuf_unittest_TestAllTypes_NestedMessage__Descriptor,
-            new string[] { "Bb", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__Descriptor
-        = internal__static_protobuf_unittest_TestAllTypes__Descriptor.NestedTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup.Builder> internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup.Builder>(internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__Descriptor,
-            new string[] { "A", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__Descriptor
-        = internal__static_protobuf_unittest_TestAllTypes__Descriptor.NestedTypes[2];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup.Builder> internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup.Builder>(internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__Descriptor,
-            new string[] { "A", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_ForeignMessage__Descriptor
-        = Descriptor.MessageTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ForeignMessage, global::Google.ProtocolBuffers.TestProtos.ForeignMessage.Builder> internal__static_protobuf_unittest_ForeignMessage__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ForeignMessage, global::Google.ProtocolBuffers.TestProtos.ForeignMessage.Builder>(internal__static_protobuf_unittest_ForeignMessage__Descriptor,
-            new string[] { "C", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllExtensions__Descriptor
-        = Descriptor.MessageTypes[2];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllExtensions, global::Google.ProtocolBuffers.TestProtos.TestAllExtensions.Builder> internal__static_protobuf_unittest_TestAllExtensions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllExtensions, global::Google.ProtocolBuffers.TestProtos.TestAllExtensions.Builder>(internal__static_protobuf_unittest_TestAllExtensions__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_OptionalGroup_extension__Descriptor
-        = Descriptor.MessageTypes[3];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension, global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension.Builder> internal__static_protobuf_unittest_OptionalGroup_extension__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension, global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension.Builder>(internal__static_protobuf_unittest_OptionalGroup_extension__Descriptor,
-            new string[] { "A", });
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-        = Descriptor.MessageTypes[4];
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-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension, global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension.Builder>(internal__static_protobuf_unittest_RepeatedGroup_extension__Descriptor,
-            new string[] { "A", });
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-        = Descriptor.MessageTypes[5];
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-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequired, global::Google.ProtocolBuffers.TestProtos.TestRequired.Builder>(internal__static_protobuf_unittest_TestRequired__Descriptor,
-            new string[] { "A", "Dummy2", "B", "Dummy4", "Dummy5", "Dummy6", "Dummy7", "Dummy8", "Dummy9", "Dummy10", "Dummy11", "Dummy12", "Dummy13", "Dummy14", "Dummy15", "Dummy16", "Dummy17", "Dummy18", "Dummy19", "Dummy20", "Dummy21", "Dummy22", "Dummy23", "Dummy24", "Dummy25", "Dummy26", "Dummy27", "Dummy28", "Dummy29", "Dummy30", "Dummy31", "Dummy32", "C", });
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-        = Descriptor.MessageTypes[6];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign, global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign.Builder> internal__static_protobuf_unittest_TestRequiredForeign__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign, global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign.Builder>(internal__static_protobuf_unittest_TestRequiredForeign__Descriptor,
-            new string[] { "OptionalMessage", "RepeatedMessage", "Dummy", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestForeignNested__Descriptor
-        = Descriptor.MessageTypes[7];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestForeignNested, global::Google.ProtocolBuffers.TestProtos.TestForeignNested.Builder> internal__static_protobuf_unittest_TestForeignNested__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestForeignNested, global::Google.ProtocolBuffers.TestProtos.TestForeignNested.Builder>(internal__static_protobuf_unittest_TestForeignNested__Descriptor,
-            new string[] { "ForeignNested", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestEmptyMessage__Descriptor
-        = Descriptor.MessageTypes[8];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage.Builder> internal__static_protobuf_unittest_TestEmptyMessage__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage.Builder>(internal__static_protobuf_unittest_TestEmptyMessage__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__Descriptor
-        = Descriptor.MessageTypes[9];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions.Builder> internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions.Builder>(internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestReallyLargeTagNumber__Descriptor
-        = Descriptor.MessageTypes[10];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber, global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber.Builder> internal__static_protobuf_unittest_TestReallyLargeTagNumber__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber, global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber.Builder>(internal__static_protobuf_unittest_TestReallyLargeTagNumber__Descriptor,
-            new string[] { "A", "Bb", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestRecursiveMessage__Descriptor
-        = Descriptor.MessageTypes[11];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage, global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage.Builder> internal__static_protobuf_unittest_TestRecursiveMessage__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage, global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage.Builder>(internal__static_protobuf_unittest_TestRecursiveMessage__Descriptor,
-            new string[] { "A", "I", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMutualRecursionA__Descriptor
-        = Descriptor.MessageTypes[12];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA.Builder> internal__static_protobuf_unittest_TestMutualRecursionA__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA.Builder>(internal__static_protobuf_unittest_TestMutualRecursionA__Descriptor,
-            new string[] { "Bb", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestMutualRecursionB__Descriptor
-        = Descriptor.MessageTypes[13];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB.Builder> internal__static_protobuf_unittest_TestMutualRecursionB__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB.Builder>(internal__static_protobuf_unittest_TestMutualRecursionB__Descriptor,
-            new string[] { "A", "OptionalInt32", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor
-        = Descriptor.MessageTypes[14];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Builder> internal__static_protobuf_unittest_TestDupFieldNumber__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Builder>(internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor,
-            new string[] { "A", "Foo", "Bar", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestDupFieldNumber_Foo__Descriptor
-        = internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo.Builder> internal__static_protobuf_unittest_TestDupFieldNumber_Foo__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo.Builder>(internal__static_protobuf_unittest_TestDupFieldNumber_Foo__Descriptor,
-            new string[] { "A", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestDupFieldNumber_Bar__Descriptor
-        = internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor.NestedTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar.Builder> internal__static_protobuf_unittest_TestDupFieldNumber_Bar__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar.Builder>(internal__static_protobuf_unittest_TestDupFieldNumber_Bar__Descriptor,
-            new string[] { "A", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor
-        = Descriptor.MessageTypes[15];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Builder> internal__static_protobuf_unittest_TestNestedMessageHasBits__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Builder>(internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor,
-            new string[] { "OptionalNestedMessage", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__Descriptor
-        = internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage.Builder> internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage.Builder>(internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__Descriptor,
-            new string[] { "NestedmessageRepeatedInt32", "NestedmessageRepeatedForeignmessage", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestCamelCaseFieldNames__Descriptor
-        = Descriptor.MessageTypes[16];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames, global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames.Builder> internal__static_protobuf_unittest_TestCamelCaseFieldNames__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames, global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames.Builder>(internal__static_protobuf_unittest_TestCamelCaseFieldNames__Descriptor,
-            new string[] { "PrimitiveField", "StringField", "EnumField", "MessageField", "StringPieceField", "CordField", "RepeatedPrimitiveField", "RepeatedStringField", "RepeatedEnumField", "RepeatedMessageField", "RepeatedStringPieceField", "RepeatedCordField", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestFieldOrderings__Descriptor
-        = Descriptor.MessageTypes[17];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings, global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings.Builder> internal__static_protobuf_unittest_TestFieldOrderings__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings, global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings.Builder>(internal__static_protobuf_unittest_TestFieldOrderings__Descriptor,
-            new string[] { "MyString", "MyInt", "MyFloat", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestExtremeDefaultValues__Descriptor
-        = Descriptor.MessageTypes[18];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues, global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues.Builder> internal__static_protobuf_unittest_TestExtremeDefaultValues__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues, global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues.Builder>(internal__static_protobuf_unittest_TestExtremeDefaultValues__Descriptor,
-            new string[] { "EscapedBytes", "LargeUint32", "LargeUint64", "SmallInt32", "SmallInt64", "Utf8String", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestPackedTypes__Descriptor
-        = Descriptor.MessageTypes[19];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedTypes, global::Google.ProtocolBuffers.TestProtos.TestPackedTypes.Builder> internal__static_protobuf_unittest_TestPackedTypes__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedTypes, global::Google.ProtocolBuffers.TestProtos.TestPackedTypes.Builder>(internal__static_protobuf_unittest_TestPackedTypes__Descriptor,
-            new string[] { "PackedInt32", "PackedInt64", "PackedUint32", "PackedUint64", "PackedSint32", "PackedSint64", "PackedFixed32", "PackedFixed64", "PackedSfixed32", "PackedSfixed64", "PackedFloat", "PackedDouble", "PackedBool", "PackedEnum", });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_TestPackedExtensions__Descriptor
-        = Descriptor.MessageTypes[20];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions, global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions.Builder> internal__static_protobuf_unittest_TestPackedExtensions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions, global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions.Builder>(internal__static_protobuf_unittest_TestPackedExtensions__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_FooRequest__Descriptor
-        = Descriptor.MessageTypes[21];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooRequest, global::Google.ProtocolBuffers.TestProtos.FooRequest.Builder> internal__static_protobuf_unittest_FooRequest__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooRequest, global::Google.ProtocolBuffers.TestProtos.FooRequest.Builder>(internal__static_protobuf_unittest_FooRequest__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_FooResponse__Descriptor
-        = Descriptor.MessageTypes[22];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooResponse, global::Google.ProtocolBuffers.TestProtos.FooResponse.Builder> internal__static_protobuf_unittest_FooResponse__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooResponse, global::Google.ProtocolBuffers.TestProtos.FooResponse.Builder>(internal__static_protobuf_unittest_FooResponse__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_BarRequest__Descriptor
-        = Descriptor.MessageTypes[23];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarRequest, global::Google.ProtocolBuffers.TestProtos.BarRequest.Builder> internal__static_protobuf_unittest_BarRequest__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarRequest, global::Google.ProtocolBuffers.TestProtos.BarRequest.Builder>(internal__static_protobuf_unittest_BarRequest__Descriptor,
-            new string[] { });
-    internal static readonly pbd::MessageDescriptor internal__static_protobuf_unittest_BarResponse__Descriptor
-        = Descriptor.MessageTypes[24];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarResponse, global::Google.ProtocolBuffers.TestProtos.BarResponse.Builder> internal__static_protobuf_unittest_BarResponse__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarResponse, global::Google.ProtocolBuffers.TestProtos.BarResponse.Builder>(internal__static_protobuf_unittest_BarResponse__Descriptor,
-            new string[] { });
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Builder> internal__static_protobuf_unittest_TestAllTypes__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes_NestedMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage.Builder> internal__static_protobuf_unittest_TestAllTypes_NestedMessage__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup.Builder> internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup.Builder> internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_ForeignMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ForeignMessage, global::Google.ProtocolBuffers.TestProtos.ForeignMessage.Builder> internal__static_protobuf_unittest_ForeignMessage__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestAllExtensions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllExtensions, global::Google.ProtocolBuffers.TestProtos.TestAllExtensions.Builder> internal__static_protobuf_unittest_TestAllExtensions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_OptionalGroup_extension__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension, global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension.Builder> internal__static_protobuf_unittest_OptionalGroup_extension__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_RepeatedGroup_extension__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension, global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension.Builder> internal__static_protobuf_unittest_RepeatedGroup_extension__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestRequired__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequired, global::Google.ProtocolBuffers.TestProtos.TestRequired.Builder> internal__static_protobuf_unittest_TestRequired__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestRequiredForeign__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign, global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign.Builder> internal__static_protobuf_unittest_TestRequiredForeign__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestForeignNested__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestForeignNested, global::Google.ProtocolBuffers.TestProtos.TestForeignNested.Builder> internal__static_protobuf_unittest_TestForeignNested__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestEmptyMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage.Builder> internal__static_protobuf_unittest_TestEmptyMessage__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions.Builder> internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestReallyLargeTagNumber__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber, global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber.Builder> internal__static_protobuf_unittest_TestReallyLargeTagNumber__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestRecursiveMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage, global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage.Builder> internal__static_protobuf_unittest_TestRecursiveMessage__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMutualRecursionA__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA.Builder> internal__static_protobuf_unittest_TestMutualRecursionA__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestMutualRecursionB__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB.Builder> internal__static_protobuf_unittest_TestMutualRecursionB__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Builder> internal__static_protobuf_unittest_TestDupFieldNumber__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestDupFieldNumber_Foo__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo.Builder> internal__static_protobuf_unittest_TestDupFieldNumber_Foo__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestDupFieldNumber_Bar__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar.Builder> internal__static_protobuf_unittest_TestDupFieldNumber_Bar__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Builder> internal__static_protobuf_unittest_TestNestedMessageHasBits__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage.Builder> internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestCamelCaseFieldNames__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames, global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames.Builder> internal__static_protobuf_unittest_TestCamelCaseFieldNames__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestFieldOrderings__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings, global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings.Builder> internal__static_protobuf_unittest_TestFieldOrderings__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestExtremeDefaultValues__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues, global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues.Builder> internal__static_protobuf_unittest_TestExtremeDefaultValues__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestPackedTypes__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedTypes, global::Google.ProtocolBuffers.TestProtos.TestPackedTypes.Builder> internal__static_protobuf_unittest_TestPackedTypes__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_TestPackedExtensions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions, global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions.Builder> internal__static_protobuf_unittest_TestPackedExtensions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_FooRequest__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooRequest, global::Google.ProtocolBuffers.TestProtos.FooRequest.Builder> internal__static_protobuf_unittest_FooRequest__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_FooResponse__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooResponse, global::Google.ProtocolBuffers.TestProtos.FooResponse.Builder> internal__static_protobuf_unittest_FooResponse__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_BarRequest__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarRequest, global::Google.ProtocolBuffers.TestProtos.BarRequest.Builder> internal__static_protobuf_unittest_BarRequest__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_protobuf_unittest_BarResponse__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarResponse, global::Google.ProtocolBuffers.TestProtos.BarResponse.Builder> internal__static_protobuf_unittest_BarResponse__FieldAccessorTable;
     #endregion
+    #region Descriptor
+    public static pbd::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbd::FileDescriptor descriptor;
+    
+    static UnitTestProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
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+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_protobuf_unittest_TestAllTypes__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_protobuf_unittest_TestAllTypes__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Builder>(internal__static_protobuf_unittest_TestAllTypes__Descriptor,
+                new string[] { "OptionalInt32", "OptionalInt64", "OptionalUint32", "OptionalUint64", "OptionalSint32", "OptionalSint64", "OptionalFixed32", "OptionalFixed64", "OptionalSfixed32", "OptionalSfixed64", "OptionalFloat", "OptionalDouble", "OptionalBool", "OptionalString", "OptionalBytes", "OptionalGroup", "OptionalNestedMessage", "OptionalForeignMessage", "OptionalImportMessage", "OptionalNestedEnum", "OptionalForeignEnum", "OptionalImportEnum", "OptionalStringPiece", "OptionalCord", "RepeatedInt32", "RepeatedInt64", "RepeatedUint32", "RepeatedUint64", "RepeatedSint32", "RepeatedSint64", "RepeatedFixed32", "RepeatedFixed64", "RepeatedSfixed32", "RepeatedSfixed64", "RepeatedFloat", "RepeatedDouble", "RepeatedBool", "RepeatedString", "RepeatedBytes", "RepeatedGroup", "RepeatedNestedMessage", "RepeatedForeignMessage", "RepeatedImportMessage", "RepeatedNestedEnum", "RepeatedForeignEnum", "RepeatedImportEnum", "RepeatedStringPiece", "RepeatedCord", "DefaultInt32", "DefaultInt64", "DefaultUint32", "DefaultUint64", "DefaultSint32", "DefaultSint64", "DefaultFixed32", "DefaultFixed64", "DefaultSfixed32", "DefaultSfixed64", "DefaultFloat", "DefaultDouble", "DefaultBool", "DefaultString", "DefaultBytes", "DefaultNestedEnum", "DefaultForeignEnum", "DefaultImportEnum", "DefaultStringPiece", "DefaultCord", });
+        internal__static_protobuf_unittest_TestAllTypes_NestedMessage__Descriptor = internal__static_protobuf_unittest_TestAllTypes__Descriptor.NestedTypes[0];
+        internal__static_protobuf_unittest_TestAllTypes_NestedMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage.Builder>(internal__static_protobuf_unittest_TestAllTypes_NestedMessage__Descriptor,
+                new string[] { "Bb", });
+        internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__Descriptor = internal__static_protobuf_unittest_TestAllTypes__Descriptor.NestedTypes[1];
+        internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.OptionalGroup.Builder>(internal__static_protobuf_unittest_TestAllTypes_OptionalGroup__Descriptor,
+                new string[] { "A", });
+        internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__Descriptor = internal__static_protobuf_unittest_TestAllTypes__Descriptor.NestedTypes[2];
+        internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup, global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.RepeatedGroup.Builder>(internal__static_protobuf_unittest_TestAllTypes_RepeatedGroup__Descriptor,
+                new string[] { "A", });
+        internal__static_protobuf_unittest_ForeignMessage__Descriptor = Descriptor.MessageTypes[1];
+        internal__static_protobuf_unittest_ForeignMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.ForeignMessage, global::Google.ProtocolBuffers.TestProtos.ForeignMessage.Builder>(internal__static_protobuf_unittest_ForeignMessage__Descriptor,
+                new string[] { "C", });
+        internal__static_protobuf_unittest_TestAllExtensions__Descriptor = Descriptor.MessageTypes[2];
+        internal__static_protobuf_unittest_TestAllExtensions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestAllExtensions, global::Google.ProtocolBuffers.TestProtos.TestAllExtensions.Builder>(internal__static_protobuf_unittest_TestAllExtensions__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_OptionalGroup_extension__Descriptor = Descriptor.MessageTypes[3];
+        internal__static_protobuf_unittest_OptionalGroup_extension__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension, global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension.Builder>(internal__static_protobuf_unittest_OptionalGroup_extension__Descriptor,
+                new string[] { "A", });
+        internal__static_protobuf_unittest_RepeatedGroup_extension__Descriptor = Descriptor.MessageTypes[4];
+        internal__static_protobuf_unittest_RepeatedGroup_extension__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension, global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension.Builder>(internal__static_protobuf_unittest_RepeatedGroup_extension__Descriptor,
+                new string[] { "A", });
+        internal__static_protobuf_unittest_TestRequired__Descriptor = Descriptor.MessageTypes[5];
+        internal__static_protobuf_unittest_TestRequired__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequired, global::Google.ProtocolBuffers.TestProtos.TestRequired.Builder>(internal__static_protobuf_unittest_TestRequired__Descriptor,
+                new string[] { "A", "Dummy2", "B", "Dummy4", "Dummy5", "Dummy6", "Dummy7", "Dummy8", "Dummy9", "Dummy10", "Dummy11", "Dummy12", "Dummy13", "Dummy14", "Dummy15", "Dummy16", "Dummy17", "Dummy18", "Dummy19", "Dummy20", "Dummy21", "Dummy22", "Dummy23", "Dummy24", "Dummy25", "Dummy26", "Dummy27", "Dummy28", "Dummy29", "Dummy30", "Dummy31", "Dummy32", "C", });
+        global::Google.ProtocolBuffers.TestProtos.TestRequired.Single = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestRequired>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.TestRequired.Descriptor.Extensions[0]);
+        global::Google.ProtocolBuffers.TestProtos.TestRequired.Multi = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.TestRequired>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.TestRequired.Descriptor.Extensions[1]);
+        internal__static_protobuf_unittest_TestRequiredForeign__Descriptor = Descriptor.MessageTypes[6];
+        internal__static_protobuf_unittest_TestRequiredForeign__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign, global::Google.ProtocolBuffers.TestProtos.TestRequiredForeign.Builder>(internal__static_protobuf_unittest_TestRequiredForeign__Descriptor,
+                new string[] { "OptionalMessage", "RepeatedMessage", "Dummy", });
+        internal__static_protobuf_unittest_TestForeignNested__Descriptor = Descriptor.MessageTypes[7];
+        internal__static_protobuf_unittest_TestForeignNested__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestForeignNested, global::Google.ProtocolBuffers.TestProtos.TestForeignNested.Builder>(internal__static_protobuf_unittest_TestForeignNested__Descriptor,
+                new string[] { "ForeignNested", });
+        internal__static_protobuf_unittest_TestEmptyMessage__Descriptor = Descriptor.MessageTypes[8];
+        internal__static_protobuf_unittest_TestEmptyMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessage.Builder>(internal__static_protobuf_unittest_TestEmptyMessage__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__Descriptor = Descriptor.MessageTypes[9];
+        internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions, global::Google.ProtocolBuffers.TestProtos.TestEmptyMessageWithExtensions.Builder>(internal__static_protobuf_unittest_TestEmptyMessageWithExtensions__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_TestReallyLargeTagNumber__Descriptor = Descriptor.MessageTypes[10];
+        internal__static_protobuf_unittest_TestReallyLargeTagNumber__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber, global::Google.ProtocolBuffers.TestProtos.TestReallyLargeTagNumber.Builder>(internal__static_protobuf_unittest_TestReallyLargeTagNumber__Descriptor,
+                new string[] { "A", "Bb", });
+        internal__static_protobuf_unittest_TestRecursiveMessage__Descriptor = Descriptor.MessageTypes[11];
+        internal__static_protobuf_unittest_TestRecursiveMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage, global::Google.ProtocolBuffers.TestProtos.TestRecursiveMessage.Builder>(internal__static_protobuf_unittest_TestRecursiveMessage__Descriptor,
+                new string[] { "A", "I", });
+        internal__static_protobuf_unittest_TestMutualRecursionA__Descriptor = Descriptor.MessageTypes[12];
+        internal__static_protobuf_unittest_TestMutualRecursionA__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionA.Builder>(internal__static_protobuf_unittest_TestMutualRecursionA__Descriptor,
+                new string[] { "Bb", });
+        internal__static_protobuf_unittest_TestMutualRecursionB__Descriptor = Descriptor.MessageTypes[13];
+        internal__static_protobuf_unittest_TestMutualRecursionB__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB, global::Google.ProtocolBuffers.TestProtos.TestMutualRecursionB.Builder>(internal__static_protobuf_unittest_TestMutualRecursionB__Descriptor,
+                new string[] { "A", "OptionalInt32", });
+        internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor = Descriptor.MessageTypes[14];
+        internal__static_protobuf_unittest_TestDupFieldNumber__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Builder>(internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor,
+                new string[] { "A", "Foo", "Bar", });
+        internal__static_protobuf_unittest_TestDupFieldNumber_Foo__Descriptor = internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor.NestedTypes[0];
+        internal__static_protobuf_unittest_TestDupFieldNumber_Foo__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Foo.Builder>(internal__static_protobuf_unittest_TestDupFieldNumber_Foo__Descriptor,
+                new string[] { "A", });
+        internal__static_protobuf_unittest_TestDupFieldNumber_Bar__Descriptor = internal__static_protobuf_unittest_TestDupFieldNumber__Descriptor.NestedTypes[1];
+        internal__static_protobuf_unittest_TestDupFieldNumber_Bar__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar, global::Google.ProtocolBuffers.TestProtos.TestDupFieldNumber.Types.Bar.Builder>(internal__static_protobuf_unittest_TestDupFieldNumber_Bar__Descriptor,
+                new string[] { "A", });
+        internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor = Descriptor.MessageTypes[15];
+        internal__static_protobuf_unittest_TestNestedMessageHasBits__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Builder>(internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor,
+                new string[] { "OptionalNestedMessage", });
+        internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__Descriptor = internal__static_protobuf_unittest_TestNestedMessageHasBits__Descriptor.NestedTypes[0];
+        internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage, global::Google.ProtocolBuffers.TestProtos.TestNestedMessageHasBits.Types.NestedMessage.Builder>(internal__static_protobuf_unittest_TestNestedMessageHasBits_NestedMessage__Descriptor,
+                new string[] { "NestedmessageRepeatedInt32", "NestedmessageRepeatedForeignmessage", });
+        internal__static_protobuf_unittest_TestCamelCaseFieldNames__Descriptor = Descriptor.MessageTypes[16];
+        internal__static_protobuf_unittest_TestCamelCaseFieldNames__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames, global::Google.ProtocolBuffers.TestProtos.TestCamelCaseFieldNames.Builder>(internal__static_protobuf_unittest_TestCamelCaseFieldNames__Descriptor,
+                new string[] { "PrimitiveField", "StringField", "EnumField", "MessageField", "StringPieceField", "CordField", "RepeatedPrimitiveField", "RepeatedStringField", "RepeatedEnumField", "RepeatedMessageField", "RepeatedStringPieceField", "RepeatedCordField", });
+        internal__static_protobuf_unittest_TestFieldOrderings__Descriptor = Descriptor.MessageTypes[17];
+        internal__static_protobuf_unittest_TestFieldOrderings__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings, global::Google.ProtocolBuffers.TestProtos.TestFieldOrderings.Builder>(internal__static_protobuf_unittest_TestFieldOrderings__Descriptor,
+                new string[] { "MyString", "MyInt", "MyFloat", });
+        internal__static_protobuf_unittest_TestExtremeDefaultValues__Descriptor = Descriptor.MessageTypes[18];
+        internal__static_protobuf_unittest_TestExtremeDefaultValues__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues, global::Google.ProtocolBuffers.TestProtos.TestExtremeDefaultValues.Builder>(internal__static_protobuf_unittest_TestExtremeDefaultValues__Descriptor,
+                new string[] { "EscapedBytes", "LargeUint32", "LargeUint64", "SmallInt32", "SmallInt64", "Utf8String", });
+        internal__static_protobuf_unittest_TestPackedTypes__Descriptor = Descriptor.MessageTypes[19];
+        internal__static_protobuf_unittest_TestPackedTypes__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedTypes, global::Google.ProtocolBuffers.TestProtos.TestPackedTypes.Builder>(internal__static_protobuf_unittest_TestPackedTypes__Descriptor,
+                new string[] { "PackedInt32", "PackedInt64", "PackedUint32", "PackedUint64", "PackedSint32", "PackedSint64", "PackedFixed32", "PackedFixed64", "PackedSfixed32", "PackedSfixed64", "PackedFloat", "PackedDouble", "PackedBool", "PackedEnum", });
+        internal__static_protobuf_unittest_TestPackedExtensions__Descriptor = Descriptor.MessageTypes[20];
+        internal__static_protobuf_unittest_TestPackedExtensions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions, global::Google.ProtocolBuffers.TestProtos.TestPackedExtensions.Builder>(internal__static_protobuf_unittest_TestPackedExtensions__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_FooRequest__Descriptor = Descriptor.MessageTypes[21];
+        internal__static_protobuf_unittest_FooRequest__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooRequest, global::Google.ProtocolBuffers.TestProtos.FooRequest.Builder>(internal__static_protobuf_unittest_FooRequest__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_FooResponse__Descriptor = Descriptor.MessageTypes[22];
+        internal__static_protobuf_unittest_FooResponse__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.FooResponse, global::Google.ProtocolBuffers.TestProtos.FooResponse.Builder>(internal__static_protobuf_unittest_FooResponse__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_BarRequest__Descriptor = Descriptor.MessageTypes[23];
+        internal__static_protobuf_unittest_BarRequest__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarRequest, global::Google.ProtocolBuffers.TestProtos.BarRequest.Builder>(internal__static_protobuf_unittest_BarRequest__Descriptor,
+                new string[] { });
+        internal__static_protobuf_unittest_BarResponse__Descriptor = Descriptor.MessageTypes[24];
+        internal__static_protobuf_unittest_BarResponse__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.TestProtos.BarResponse, global::Google.ProtocolBuffers.TestProtos.BarResponse.Builder>(internal__static_protobuf_unittest_BarResponse__Descriptor,
+                new string[] { });
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalInt32Extension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[0]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalInt64Extension = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[1]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalUint32Extension = pb::GeneratedSingleExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[2]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalUint64Extension = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[3]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSint32Extension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[4]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSint64Extension = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[5]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalFixed32Extension = pb::GeneratedSingleExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[6]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalFixed64Extension = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[7]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSfixed32Extension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[8]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalSfixed64Extension = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[9]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalFloatExtension = pb::GeneratedSingleExtension<float>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[10]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalDoubleExtension = pb::GeneratedSingleExtension<double>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[11]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalBoolExtension = pb::GeneratedSingleExtension<bool>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[12]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalStringExtension = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[13]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalBytesExtension = pb::GeneratedSingleExtension<pb::ByteString>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[14]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalGroupExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.OptionalGroup_extension>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[15]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalNestedMessageExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[16]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalForeignMessageExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ForeignMessage>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[17]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalImportMessageExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ImportMessage>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[18]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalNestedEnumExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[19]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalForeignEnumExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[20]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalImportEnumExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ImportEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[21]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalStringPieceExtension = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[22]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.OptionalCordExtension = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[23]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedInt32Extension = pb::GeneratedRepeatExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[24]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedInt64Extension = pb::GeneratedRepeatExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[25]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedUint32Extension = pb::GeneratedRepeatExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[26]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedUint64Extension = pb::GeneratedRepeatExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[27]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSint32Extension = pb::GeneratedRepeatExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[28]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSint64Extension = pb::GeneratedRepeatExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[29]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedFixed32Extension = pb::GeneratedRepeatExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[30]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedFixed64Extension = pb::GeneratedRepeatExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[31]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSfixed32Extension = pb::GeneratedRepeatExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[32]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedSfixed64Extension = pb::GeneratedRepeatExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[33]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedFloatExtension = pb::GeneratedRepeatExtension<float>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[34]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedDoubleExtension = pb::GeneratedRepeatExtension<double>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[35]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedBoolExtension = pb::GeneratedRepeatExtension<bool>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[36]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedStringExtension = pb::GeneratedRepeatExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[37]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedBytesExtension = pb::GeneratedRepeatExtension<pb::ByteString>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[38]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedGroupExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.RepeatedGroup_extension>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[39]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedNestedMessageExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedMessage>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[40]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedForeignMessageExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ForeignMessage>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[41]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedImportMessageExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ImportMessage>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[42]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedNestedEnumExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[43]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedForeignEnumExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[44]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedImportEnumExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ImportEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[45]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedStringPieceExtension = pb::GeneratedRepeatExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[46]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.RepeatedCordExtension = pb::GeneratedRepeatExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[47]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultInt32Extension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[48]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultInt64Extension = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[49]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultUint32Extension = pb::GeneratedSingleExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[50]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultUint64Extension = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[51]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSint32Extension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[52]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSint64Extension = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[53]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultFixed32Extension = pb::GeneratedSingleExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[54]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultFixed64Extension = pb::GeneratedSingleExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[55]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSfixed32Extension = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[56]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultSfixed64Extension = pb::GeneratedSingleExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[57]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultFloatExtension = pb::GeneratedSingleExtension<float>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[58]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultDoubleExtension = pb::GeneratedSingleExtension<double>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[59]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultBoolExtension = pb::GeneratedSingleExtension<bool>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[60]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultStringExtension = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[61]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultBytesExtension = pb::GeneratedSingleExtension<pb::ByteString>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[62]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultNestedEnumExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestAllTypes.Types.NestedEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[63]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultForeignEnumExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[64]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultImportEnumExtension = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.ImportEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[65]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultStringPieceExtension = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[66]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.DefaultCordExtension = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[67]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.MyExtensionString = pb::GeneratedSingleExtension<string>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[68]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.MyExtensionInt = pb::GeneratedSingleExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[69]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedInt32Extension = pb::GeneratedRepeatExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[70]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedInt64Extension = pb::GeneratedRepeatExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[71]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedUint32Extension = pb::GeneratedRepeatExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[72]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedUint64Extension = pb::GeneratedRepeatExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[73]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSint32Extension = pb::GeneratedRepeatExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[74]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSint64Extension = pb::GeneratedRepeatExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[75]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedFixed32Extension = pb::GeneratedRepeatExtension<uint>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[76]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedFixed64Extension = pb::GeneratedRepeatExtension<ulong>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[77]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSfixed32Extension = pb::GeneratedRepeatExtension<int>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[78]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedSfixed64Extension = pb::GeneratedRepeatExtension<long>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[79]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedFloatExtension = pb::GeneratedRepeatExtension<float>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[80]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedDoubleExtension = pb::GeneratedRepeatExtension<double>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[81]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedBoolExtension = pb::GeneratedRepeatExtension<bool>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[82]);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.PackedEnumExtension = pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.ForeignEnum>.CreateInstance(global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor.Extensions[83]);
+        pb::ExtensionRegistry registry = pb::ExtensionRegistry.CreateInstance();
+        RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.RegisterAllExtensions(registry);
+        global::Google.ProtocolBuffers.TestProtos.UnitTestImportProtoFile.RegisterAllExtensions(registry);
+        return registry;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
+          global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor, 
+          global::Google.ProtocolBuffers.TestProtos.UnitTestImportProtoFile.Descriptor, 
+          }, assigner);
+    }
+    #endregion
+    
   }
   #region Enums
   public enum ForeignEnum {
@@ -1046,6 +1143,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static NestedMessage() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+        }
       }
       
       public sealed partial class OptionalGroup : pb::GeneratedMessage<OptionalGroup, OptionalGroup.Builder> {
@@ -1257,6 +1357,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static OptionalGroup() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+        }
       }
       
       public sealed partial class RepeatedGroup : pb::GeneratedMessage<RepeatedGroup, RepeatedGroup.Builder> {
@@ -1468,6 +1571,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static RepeatedGroup() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+        }
       }
       
     }
@@ -5039,6 +5145,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestAllTypes() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ForeignMessage : pb::GeneratedMessage<ForeignMessage, ForeignMessage.Builder> {
@@ -5250,6 +5359,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static ForeignMessage() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestAllExtensions : pb::ExtendableMessage<TestAllExtensions, TestAllExtensions.Builder> {
@@ -5425,6 +5537,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static TestAllExtensions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class OptionalGroup_extension : pb::GeneratedMessage<OptionalGroup_extension, OptionalGroup_extension.Builder> {
@@ -5636,6 +5751,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static OptionalGroup_extension() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class RepeatedGroup_extension : pb::GeneratedMessage<RepeatedGroup_extension, RepeatedGroup_extension.Builder> {
@@ -5847,6 +5965,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static RepeatedGroup_extension() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestRequired : pb::GeneratedMessage<TestRequired, TestRequired.Builder> {
@@ -5872,12 +5993,9 @@ namespace Google.ProtocolBuffers.TestProtos {
     }
     
     public const int SingleFieldNumber = 1000;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestRequired> Single =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.TestProtos.TestRequired>.CreateInstance(Descriptor.Extensions[0]);
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.TestProtos.TestRequired> Single;
     public const int MultiFieldNumber = 1001;
-    public static readonly
-        pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.TestRequired>> Multi =
-        pb::GeneratedRepeatExtension<global::Google.ProtocolBuffers.TestProtos.TestRequired>.CreateInstance(Descriptor.Extensions[1]);
+    public static pb::GeneratedExtensionBase<scg::IList<global::Google.ProtocolBuffers.TestProtos.TestRequired>> Multi;
     public const int AFieldNumber = 1;
     private bool hasA;
     private int a_ = 0;
@@ -7380,6 +7498,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestRequired() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestRequiredForeign : pb::GeneratedMessage<TestRequiredForeign, TestRequiredForeign.Builder> {
@@ -7727,6 +7848,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestRequiredForeign() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestForeignNested : pb::GeneratedMessage<TestForeignNested, TestForeignNested.Builder> {
@@ -7961,6 +8085,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestForeignNested() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestEmptyMessage : pb::GeneratedMessage<TestEmptyMessage, TestEmptyMessage.Builder> {
@@ -8131,6 +8258,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static TestEmptyMessage() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestEmptyMessageWithExtensions : pb::ExtendableMessage<TestEmptyMessageWithExtensions, TestEmptyMessageWithExtensions.Builder> {
@@ -8306,6 +8436,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static TestEmptyMessageWithExtensions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestReallyLargeTagNumber : pb::GeneratedMessage<TestReallyLargeTagNumber, TestReallyLargeTagNumber.Builder> {
@@ -8558,6 +8691,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestReallyLargeTagNumber() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestRecursiveMessage : pb::GeneratedMessage<TestRecursiveMessage, TestRecursiveMessage.Builder> {
@@ -8833,6 +8969,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestRecursiveMessage() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestMutualRecursionA : pb::GeneratedMessage<TestMutualRecursionA, TestMutualRecursionA.Builder> {
@@ -9067,6 +9206,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestMutualRecursionA() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestMutualRecursionB : pb::GeneratedMessage<TestMutualRecursionB, TestMutualRecursionB.Builder> {
@@ -9342,6 +9484,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestMutualRecursionB() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestDupFieldNumber : pb::GeneratedMessage<TestDupFieldNumber, TestDupFieldNumber.Builder> {
@@ -9577,6 +9722,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static Foo() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+        }
       }
       
       public sealed partial class Bar : pb::GeneratedMessage<Bar, Bar.Builder> {
@@ -9788,6 +9936,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static Bar() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+        }
       }
       
     }
@@ -10108,6 +10259,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestDupFieldNumber() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestNestedMessageHasBits : pb::GeneratedMessage<TestNestedMessageHasBits, TestNestedMessageHasBits.Builder> {
@@ -10427,6 +10581,9 @@ namespace Google.ProtocolBuffers.TestProtos {
             return this;
           }
         }
+        static NestedMessage() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+        }
       }
       
     }
@@ -10642,6 +10799,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestNestedMessageHasBits() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestCamelCaseFieldNames : pb::GeneratedMessage<TestCamelCaseFieldNames, TestCamelCaseFieldNames.Builder> {
@@ -11469,6 +11629,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestCamelCaseFieldNames() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestFieldOrderings : pb::ExtendableMessage<TestFieldOrderings, TestFieldOrderings.Builder> {
@@ -11769,6 +11932,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestFieldOrderings() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestExtremeDefaultValues : pb::GeneratedMessage<TestExtremeDefaultValues, TestExtremeDefaultValues.Builder> {
@@ -12187,6 +12353,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestExtremeDefaultValues() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestPackedTypes : pb::GeneratedMessage<TestPackedTypes, TestPackedTypes.Builder> {
@@ -13319,6 +13488,9 @@ namespace Google.ProtocolBuffers.TestProtos {
         return this;
       }
     }
+    static TestPackedTypes() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class TestPackedExtensions : pb::ExtendableMessage<TestPackedExtensions, TestPackedExtensions.Builder> {
@@ -13494,6 +13666,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static TestPackedExtensions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class FooRequest : pb::GeneratedMessage<FooRequest, FooRequest.Builder> {
@@ -13664,6 +13839,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static FooRequest() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class FooResponse : pb::GeneratedMessage<FooResponse, FooResponse.Builder> {
@@ -13834,6 +14012,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static FooResponse() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class BarRequest : pb::GeneratedMessage<BarRequest, BarRequest.Builder> {
@@ -14004,6 +14185,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static BarRequest() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class BarResponse : pb::GeneratedMessage<BarResponse, BarResponse.Builder> {
@@ -14174,6 +14358,9 @@ namespace Google.ProtocolBuffers.TestProtos {
       }
       
     }
+    static BarResponse() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.TestProtos.UnitTestProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers/DescriptorProtos/CSharpOptions.cs b/src/ProtocolBuffers/DescriptorProtos/CSharpOptions.cs
index aa7aa6d7..ef227609 100644
--- a/src/ProtocolBuffers/DescriptorProtos/CSharpOptions.cs
+++ b/src/ProtocolBuffers/DescriptorProtos/CSharpOptions.cs
@@ -8,49 +8,65 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
   
   public static partial class CSharpOptions {
   
-    #region Descriptor
-    public static pbd::FileDescriptor Descriptor {
-      get { return descriptor; }
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+      registry.Add(global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.CSharpFileOptions);
+      registry.Add(global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.CSharpFieldOptions);
     }
-    private static readonly pbd::FileDescriptor descriptor = pbd::FileDescriptor.InternalBuildGeneratedFileFrom(
-        global::System.Convert.FromBase64String(
-        "CiRnb29nbGUvcHJvdG9idWYvY3NoYXJwX29wdGlvbnMucHJvdG8SD2dvb2ds" + 
-        "ZS5wcm90b2J1ZhogZ29vZ2xlL3Byb3RvYnVmL2Rlc2NyaXB0b3IucHJvdG8i" + 
-        "iAEKEUNTaGFycEZpbGVPcHRpb25zEhEKCW5hbWVzcGFjZRgBIAEoCRIaChJ1" + 
-        "bWJyZWxsYV9jbGFzc25hbWUYAiABKAkSFgoOcHVibGljX2NsYXNzZXMYAyAB" + 
-        "KAgSFgoObXVsdGlwbGVfZmlsZXMYBCABKAgSFAoMbmVzdF9jbGFzc2VzGAUg" + 
-        "ASgIIisKEkNTaGFycEZpZWxkT3B0aW9ucxIVCg1wcm9wZXJ0eV9uYW1lGAEg" + 
-        "ASgJOl4KE2NzaGFycF9maWxlX29wdGlvbnMSHC5nb29nbGUucHJvdG9idWYu" + 
-        "RmlsZU9wdGlvbnMY6AcgASgLMiIuZ29vZ2xlLnByb3RvYnVmLkNTaGFycEZp" + 
-        "bGVPcHRpb25zOmEKFGNzaGFycF9maWVsZF9vcHRpb25zEh0uZ29vZ2xlLnBy" + 
-        "b3RvYnVmLkZpZWxkT3B0aW9ucxjoByABKAsyIy5nb29nbGUucHJvdG9idWYu" + 
-        "Q1NoYXJwRmllbGRPcHRpb25z"),
-        new pbd::FileDescriptor[] {
-          global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor, 
-        });
     #endregion
-    
     #region Extensions
-    public const int CsharpFileOptionsFieldNumber = 1000;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions> CSharpFileOptions =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions>.CreateInstance(Descriptor.Extensions[0]);
-    public const int CsharpFieldOptionsFieldNumber = 1000;
-    public static readonly pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions> CSharpFieldOptions =
-        pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions>.CreateInstance(Descriptor.Extensions[1]);
+    public const int CSharpFileOptionsFieldNumber = 1000;
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions> CSharpFileOptions;
+    public const int CSharpFieldOptionsFieldNumber = 1000;
+    public static pb::GeneratedExtensionBase<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions> CSharpFieldOptions;
     #endregion
     
     #region Static variables
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_CSharpFileOptions__Descriptor
-        = Descriptor.MessageTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions.Builder> internal__static_google_protobuf_CSharpFileOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions.Builder>(internal__static_google_protobuf_CSharpFileOptions__Descriptor,
-            new string[] { "Namespace", "UmbrellaClassname", "PublicClasses", "MultipleFiles", "NestClasses", });
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_CSharpFieldOptions__Descriptor
-        = Descriptor.MessageTypes[1];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions.Builder> internal__static_google_protobuf_CSharpFieldOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions.Builder>(internal__static_google_protobuf_CSharpFieldOptions__Descriptor,
-            new string[] { "PropertyName", });
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_CSharpFileOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions.Builder> internal__static_google_protobuf_CSharpFileOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_CSharpFieldOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions.Builder> internal__static_google_protobuf_CSharpFieldOptions__FieldAccessorTable;
+    #endregion
+    #region Descriptor
+    public static pbd::FileDescriptor Descriptor {
+      get { return descriptor; }
+    }
+    private static pbd::FileDescriptor descriptor;
+    
+    static CSharpOptions() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
+          "CiRnb29nbGUvcHJvdG9idWYvY3NoYXJwX29wdGlvbnMucHJvdG8SD2dvb2ds" + 
+          "ZS5wcm90b2J1ZhogZ29vZ2xlL3Byb3RvYnVmL2Rlc2NyaXB0b3IucHJvdG8i" + 
+          "iAEKEUNTaGFycEZpbGVPcHRpb25zEhEKCW5hbWVzcGFjZRgBIAEoCRIaChJ1" + 
+          "bWJyZWxsYV9jbGFzc25hbWUYAiABKAkSFgoOcHVibGljX2NsYXNzZXMYAyAB" + 
+          "KAgSFgoObXVsdGlwbGVfZmlsZXMYBCABKAgSFAoMbmVzdF9jbGFzc2VzGAUg" + 
+          "ASgIIisKEkNTaGFycEZpZWxkT3B0aW9ucxIVCg1wcm9wZXJ0eV9uYW1lGAEg" + 
+          "ASgJOl4KE2NzaGFycF9maWxlX29wdGlvbnMSHC5nb29nbGUucHJvdG9idWYu" + 
+          "RmlsZU9wdGlvbnMY6AcgASgLMiIuZ29vZ2xlLnByb3RvYnVmLkNTaGFycEZp" + 
+          "bGVPcHRpb25zOmEKFGNzaGFycF9maWVsZF9vcHRpb25zEh0uZ29vZ2xlLnBy" + 
+          "b3RvYnVmLkZpZWxkT3B0aW9ucxjoByABKAsyIy5nb29nbGUucHJvdG9idWYu" + 
+          "Q1NoYXJwRmllbGRPcHRpb25z");
+      pbd::FileDescriptor.InternalDescriptorAssigner assigner = delegate(pbd::FileDescriptor root) {
+        descriptor = root;
+        internal__static_google_protobuf_CSharpFileOptions__Descriptor = Descriptor.MessageTypes[0];
+        internal__static_google_protobuf_CSharpFileOptions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions.Builder>(internal__static_google_protobuf_CSharpFileOptions__Descriptor,
+                new string[] { "Namespace", "UmbrellaClassname", "PublicClasses", "MultipleFiles", "NestClasses", });
+        internal__static_google_protobuf_CSharpFieldOptions__Descriptor = Descriptor.MessageTypes[1];
+        internal__static_google_protobuf_CSharpFieldOptions__FieldAccessorTable = 
+            new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions, global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions.Builder>(internal__static_google_protobuf_CSharpFieldOptions__Descriptor,
+                new string[] { "PropertyName", });
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.CSharpFileOptions = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFileOptions>.CreateInstance(global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor.Extensions[0]);
+        global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.CSharpFieldOptions = pb::GeneratedSingleExtension<global::Google.ProtocolBuffers.DescriptorProtos.CSharpFieldOptions>.CreateInstance(global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor.Extensions[1]);
+        return null;
+      };
+      pbd::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
+          new pbd::FileDescriptor[] {
+          global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor, 
+          }, assigner);
+    }
     #endregion
+    
   }
   #region Messages
   public sealed partial class CSharpFileOptions : pb::GeneratedMessage<CSharpFileOptions, CSharpFileOptions.Builder> {
@@ -293,6 +309,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static CSharpFileOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor;
+    }
   }
   
   public sealed partial class CSharpFieldOptions : pb::GeneratedMessage<CSharpFieldOptions, CSharpFieldOptions.Builder> {
@@ -422,6 +441,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static CSharpFieldOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.CSharpOptions.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers/DescriptorProtos/DescriptorProtoFile.cs b/src/ProtocolBuffers/DescriptorProtos/DescriptorProtoFile.cs
index e8138877..fef56372 100644
--- a/src/ProtocolBuffers/DescriptorProtos/DescriptorProtoFile.cs
+++ b/src/ProtocolBuffers/DescriptorProtos/DescriptorProtoFile.cs
@@ -8,185 +8,216 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
   
   public static partial class DescriptorProtoFile {
   
+    #region Extension registration
+    public static void RegisterAllExtensions(pb::ExtensionRegistry registry) {
+    }
+    #endregion
+    #region Static variables
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_FileDescriptorSet__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.FileDescriptorSet, global::Google.ProtocolBuffers.DescriptorProtos.FileDescriptorSet.Builder> internal__static_google_protobuf_FileDescriptorSet__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_FileDescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.FileDescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.FileDescriptorProto.Builder> internal__static_google_protobuf_FileDescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_DescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProto.Builder> internal__static_google_protobuf_DescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_DescriptorProto_ExtensionRange__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProto.Types.ExtensionRange, global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProto.Types.ExtensionRange.Builder> internal__static_google_protobuf_DescriptorProto_ExtensionRange__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_FieldDescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.FieldDescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.FieldDescriptorProto.Builder> internal__static_google_protobuf_FieldDescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_EnumDescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumDescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.EnumDescriptorProto.Builder> internal__static_google_protobuf_EnumDescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_EnumValueDescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumValueDescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.EnumValueDescriptorProto.Builder> internal__static_google_protobuf_EnumValueDescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_ServiceDescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.ServiceDescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.ServiceDescriptorProto.Builder> internal__static_google_protobuf_ServiceDescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_MethodDescriptorProto__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.MethodDescriptorProto, global::Google.ProtocolBuffers.DescriptorProtos.MethodDescriptorProto.Builder> internal__static_google_protobuf_MethodDescriptorProto__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_FileOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.FileOptions, global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Builder> internal__static_google_protobuf_FileOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_MessageOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.MessageOptions, global::Google.ProtocolBuffers.DescriptorProtos.MessageOptions.Builder> internal__static_google_protobuf_MessageOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_FieldOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.FieldOptions, global::Google.ProtocolBuffers.DescriptorProtos.FieldOptions.Builder> internal__static_google_protobuf_FieldOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_EnumOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumOptions, global::Google.ProtocolBuffers.DescriptorProtos.EnumOptions.Builder> internal__static_google_protobuf_EnumOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_EnumValueOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumValueOptions, global::Google.ProtocolBuffers.DescriptorProtos.EnumValueOptions.Builder> internal__static_google_protobuf_EnumValueOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_ServiceOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.ServiceOptions, global::Google.ProtocolBuffers.DescriptorProtos.ServiceOptions.Builder> internal__static_google_protobuf_ServiceOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_MethodOptions__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.MethodOptions, global::Google.ProtocolBuffers.DescriptorProtos.MethodOptions.Builder> internal__static_google_protobuf_MethodOptions__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_UninterpretedOption__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption, global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Builder> internal__static_google_protobuf_UninterpretedOption__FieldAccessorTable;
+    internal static pbd::MessageDescriptor internal__static_google_protobuf_UninterpretedOption_NamePart__Descriptor;
+    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Types.NamePart, global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Types.NamePart.Builder> internal__static_google_protobuf_UninterpretedOption_NamePart__FieldAccessorTable;
+    #endregion
     #region Descriptor
     public static pbd::FileDescriptor Descriptor {
       get { return descriptor; }
     }
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-        "KAhCKQoTY29tLmdvb2dsZS5wcm90b2J1ZkIQRGVzY3JpcHRvclByb3Rvc0gB"),
-        new pbd::FileDescriptor[] {
-        });
+    private static pbd::FileDescriptor descriptor;
+    
+    static DescriptorProtoFile() {
+      byte[] descriptorData = global::System.Convert.FromBase64String(
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-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_EnumOptions__Descriptor
-        = Descriptor.MessageTypes[11];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumOptions, global::Google.ProtocolBuffers.DescriptorProtos.EnumOptions.Builder> internal__static_google_protobuf_EnumOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumOptions, global::Google.ProtocolBuffers.DescriptorProtos.EnumOptions.Builder>(internal__static_google_protobuf_EnumOptions__Descriptor,
-            new string[] { "UninterpretedOption", });
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_EnumValueOptions__Descriptor
-        = Descriptor.MessageTypes[12];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumValueOptions, global::Google.ProtocolBuffers.DescriptorProtos.EnumValueOptions.Builder> internal__static_google_protobuf_EnumValueOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.EnumValueOptions, global::Google.ProtocolBuffers.DescriptorProtos.EnumValueOptions.Builder>(internal__static_google_protobuf_EnumValueOptions__Descriptor,
-            new string[] { "UninterpretedOption", });
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_ServiceOptions__Descriptor
-        = Descriptor.MessageTypes[13];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.ServiceOptions, global::Google.ProtocolBuffers.DescriptorProtos.ServiceOptions.Builder> internal__static_google_protobuf_ServiceOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.ServiceOptions, global::Google.ProtocolBuffers.DescriptorProtos.ServiceOptions.Builder>(internal__static_google_protobuf_ServiceOptions__Descriptor,
-            new string[] { "UninterpretedOption", });
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_MethodOptions__Descriptor
-        = Descriptor.MessageTypes[14];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.MethodOptions, global::Google.ProtocolBuffers.DescriptorProtos.MethodOptions.Builder> internal__static_google_protobuf_MethodOptions__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.MethodOptions, global::Google.ProtocolBuffers.DescriptorProtos.MethodOptions.Builder>(internal__static_google_protobuf_MethodOptions__Descriptor,
-            new string[] { "UninterpretedOption", });
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_UninterpretedOption__Descriptor
-        = Descriptor.MessageTypes[15];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption, global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Builder> internal__static_google_protobuf_UninterpretedOption__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption, global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Builder>(internal__static_google_protobuf_UninterpretedOption__Descriptor,
-            new string[] { "Name", "IdentifierValue", "PositiveIntValue", "NegativeIntValue", "DoubleValue", "StringValue", });
-    internal static readonly pbd::MessageDescriptor internal__static_google_protobuf_UninterpretedOption_NamePart__Descriptor
-        = internal__static_google_protobuf_UninterpretedOption__Descriptor.NestedTypes[0];
-    internal static pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Types.NamePart, global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Types.NamePart.Builder> internal__static_google_protobuf_UninterpretedOption_NamePart__FieldAccessorTable
-        = new pb::FieldAccess.FieldAccessorTable<global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Types.NamePart, global::Google.ProtocolBuffers.DescriptorProtos.UninterpretedOption.Types.NamePart.Builder>(internal__static_google_protobuf_UninterpretedOption_NamePart__Descriptor,
-            new string[] { "NamePart_", "IsExtension", });
-    #endregion
   }
   #region Messages
   public sealed partial class FileDescriptorSet : pb::GeneratedMessage<FileDescriptorSet, FileDescriptorSet.Builder> {
@@ -426,6 +457,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static FileDescriptorSet() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class FileDescriptorProto : pb::GeneratedMessage<FileDescriptorProto, FileDescriptorProto.Builder> {
@@ -1084,6 +1118,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static FileDescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class DescriptorProto : pb::GeneratedMessage<DescriptorProto, DescriptorProto.Builder> {
@@ -1360,6 +1397,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
             return this;
           }
         }
+        static ExtensionRange() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+        }
       }
       
     }
@@ -1962,6 +2002,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static DescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class FieldDescriptorProto : pb::GeneratedMessage<FieldDescriptorProto, FieldDescriptorProto.Builder> {
@@ -2538,6 +2581,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static FieldDescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class EnumDescriptorProto : pb::GeneratedMessage<EnumDescriptorProto, EnumDescriptorProto.Builder> {
@@ -2886,6 +2932,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static EnumDescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class EnumValueDescriptorProto : pb::GeneratedMessage<EnumValueDescriptorProto, EnumValueDescriptorProto.Builder> {
@@ -3206,6 +3255,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static EnumValueDescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ServiceDescriptorProto : pb::GeneratedMessage<ServiceDescriptorProto, ServiceDescriptorProto.Builder> {
@@ -3554,6 +3606,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static ServiceDescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class MethodDescriptorProto : pb::GeneratedMessage<MethodDescriptorProto, MethodDescriptorProto.Builder> {
@@ -3917,6 +3972,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static MethodDescriptorProto() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class FileOptions : pb::ExtendableMessage<FileOptions, FileOptions.Builder> {
@@ -3983,7 +4041,7 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
     
     public const int OptimizeForFieldNumber = 9;
     private bool hasOptimizeFor;
-    private global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Types.OptimizeMode optimizeFor_ = global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Types.OptimizeMode.CODE_SIZE;
+    private global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Types.OptimizeMode optimizeFor_ = global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Types.OptimizeMode.SPEED;
     public bool HasOptimizeFor {
       get { return hasOptimizeFor; }
     }
@@ -4303,7 +4361,7 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
       }
       public Builder ClearOptimizeFor() {
         result.hasOptimizeFor = false;
-        result.optimizeFor_ = global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Types.OptimizeMode.CODE_SIZE;
+        result.optimizeFor_ = global::Google.ProtocolBuffers.DescriptorProtos.FileOptions.Types.OptimizeMode.SPEED;
         return this;
       }
       
@@ -4345,6 +4403,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static FileOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class MessageOptions : pb::ExtendableMessage<MessageOptions, MessageOptions.Builder> {
@@ -4630,6 +4691,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static MessageOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class FieldOptions : pb::ExtendableMessage<FieldOptions, FieldOptions.Builder> {
@@ -4684,6 +4748,16 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
       get { return packed_; }
     }
     
+    public const int DeprecatedFieldNumber = 3;
+    private bool hasDeprecated;
+    private bool deprecated_ = false;
+    public bool HasDeprecated {
+      get { return hasDeprecated; }
+    }
+    public bool Deprecated {
+      get { return deprecated_; }
+    }
+    
     public const int ExperimentalMapKeyFieldNumber = 9;
     private bool hasExperimentalMapKey;
     private string experimentalMapKey_ = "";
@@ -4724,6 +4798,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
       if (HasPacked) {
         output.WriteBool(2, Packed);
       }
+      if (HasDeprecated) {
+        output.WriteBool(3, Deprecated);
+      }
       if (HasExperimentalMapKey) {
         output.WriteString(9, ExperimentalMapKey);
       }
@@ -4747,6 +4824,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         if (HasPacked) {
           size += pb::CodedOutputStream.ComputeBoolSize(2, Packed);
         }
+        if (HasDeprecated) {
+          size += pb::CodedOutputStream.ComputeBoolSize(3, Deprecated);
+        }
         if (HasExperimentalMapKey) {
           size += pb::CodedOutputStream.ComputeStringSize(9, ExperimentalMapKey);
         }
@@ -4853,6 +4933,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         if (other.HasPacked) {
           Packed = other.Packed;
         }
+        if (other.HasDeprecated) {
+          Deprecated = other.Deprecated;
+        }
         if (other.HasExperimentalMapKey) {
           ExperimentalMapKey = other.ExperimentalMapKey;
         }
@@ -4908,6 +4991,10 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
               Packed = input.ReadBool();
               break;
             }
+            case 24: {
+              Deprecated = input.ReadBool();
+              break;
+            }
             case 74: {
               ExperimentalMapKey = input.ReadString();
               break;
@@ -4959,6 +5046,24 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
       
+      public bool HasDeprecated {
+        get { return result.HasDeprecated; }
+      }
+      public bool Deprecated {
+        get { return result.Deprecated; }
+        set { SetDeprecated(value); }
+      }
+      public Builder SetDeprecated(bool value) {
+        result.hasDeprecated = true;
+        result.deprecated_ = value;
+        return this;
+      }
+      public Builder ClearDeprecated() {
+        result.hasDeprecated = false;
+        result.deprecated_ = false;
+        return this;
+      }
+      
       public bool HasExperimentalMapKey {
         get { return result.HasExperimentalMapKey; }
       }
@@ -5016,6 +5121,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static FieldOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class EnumOptions : pb::ExtendableMessage<EnumOptions, EnumOptions.Builder> {
@@ -5260,6 +5368,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static EnumOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class EnumValueOptions : pb::ExtendableMessage<EnumValueOptions, EnumValueOptions.Builder> {
@@ -5504,6 +5615,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static EnumValueOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class ServiceOptions : pb::ExtendableMessage<ServiceOptions, ServiceOptions.Builder> {
@@ -5748,6 +5862,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static ServiceOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class MethodOptions : pb::ExtendableMessage<MethodOptions, MethodOptions.Builder> {
@@ -5992,6 +6109,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static MethodOptions() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   public sealed partial class UninterpretedOption : pb::GeneratedMessage<UninterpretedOption, UninterpretedOption.Builder> {
@@ -6040,7 +6160,7 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
           get { return global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.internal__static_google_protobuf_UninterpretedOption_NamePart__FieldAccessorTable; }
         }
         
-        public const int NamePartFieldNumber = 1;
+        public const int NamePart_FieldNumber = 1;
         private bool hasNamePart_;
         private string namePart_ = "";
         public bool HasNamePart_ {
@@ -6271,6 +6391,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
             return this;
           }
         }
+        static NamePart() {
+          pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+        }
       }
       
     }
@@ -6698,6 +6821,9 @@ namespace Google.ProtocolBuffers.DescriptorProtos {
         return this;
       }
     }
+    static UninterpretedOption() {
+      pbd::FileDescriptor descriptor = global::Google.ProtocolBuffers.DescriptorProtos.DescriptorProtoFile.Descriptor;
+    }
   }
   
   #endregion
diff --git a/src/ProtocolBuffers/Descriptors/DescriptorBase.cs b/src/ProtocolBuffers/Descriptors/DescriptorBase.cs
index d7b208ee..1f4d6651 100644
--- a/src/ProtocolBuffers/Descriptors/DescriptorBase.cs
+++ b/src/ProtocolBuffers/Descriptors/DescriptorBase.cs
@@ -40,7 +40,7 @@ namespace Google.ProtocolBuffers.Descriptors {
   public abstract class DescriptorBase<TProto, TOptions> : IDescriptor<TProto>
       where TProto : IMessage, IDescriptorProto<TOptions> {
 
-    private readonly TProto proto;
+    private TProto proto;
     private readonly FileDescriptor file;
     private readonly string fullName;
 
@@ -50,6 +50,10 @@ namespace Google.ProtocolBuffers.Descriptors {
       this.fullName = fullName;
     }
 
+    internal virtual void ReplaceProto(TProto newProto) {
+      this.proto = newProto;
+    }
+
     protected static string ComputeFullName(FileDescriptor file, MessageDescriptor parent, string name) {
       if (parent != null) {
         return parent.FullName + "." + name;
@@ -65,7 +69,7 @@ namespace Google.ProtocolBuffers.Descriptors {
     }
 
     /// <summary>
-    /// Returns the protocol buffer form of this descriptor
+    /// Returns the protocol buffer form of this descriptor.
     /// </summary>
     public TProto Proto {
       get { return proto; }
diff --git a/src/ProtocolBuffers/Descriptors/EnumDescriptor.cs b/src/ProtocolBuffers/Descriptors/EnumDescriptor.cs
index 2ab9af38..0d2ca169 100644
--- a/src/ProtocolBuffers/Descriptors/EnumDescriptor.cs
+++ b/src/ProtocolBuffers/Descriptors/EnumDescriptor.cs
@@ -29,6 +29,7 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+using System;
 using System.Collections.Generic;
 using Google.ProtocolBuffers.DescriptorProtos;
 
@@ -88,5 +89,12 @@ namespace Google.ProtocolBuffers.Descriptors {
     internal EnumValueDescriptor FindValueByName(string name) {
       return File.DescriptorPool.FindSymbol<EnumValueDescriptor>(FullName + "." + name);
     }
+
+    internal override void ReplaceProto(EnumDescriptorProto newProto) {
+      base.ReplaceProto(newProto);
+      for (int i = 0; i < values.Count; i++) {
+        values[i].ReplaceProto(newProto.GetValue(i));
+      }
+    }
   }
 }
diff --git a/src/ProtocolBuffers/Descriptors/FieldDescriptor.cs b/src/ProtocolBuffers/Descriptors/FieldDescriptor.cs
index bd95e587..cd1477ac 100644
--- a/src/ProtocolBuffers/Descriptors/FieldDescriptor.cs
+++ b/src/ProtocolBuffers/Descriptors/FieldDescriptor.cs
@@ -225,7 +225,7 @@ namespace Google.ProtocolBuffers.Descriptors {
     }
 
     /// <summary>
-    /// Returns the C#-specific options for this file descriptor. This will always be
+    /// Returns the C#-specific options for this field descriptor. This will always be
     /// completely filled in.
     /// </summary>
     public CSharpFieldOptions CSharpOptions {
diff --git a/src/ProtocolBuffers/Descriptors/FileDescriptor.cs b/src/ProtocolBuffers/Descriptors/FileDescriptor.cs
index 81c4b790..a6dd7f85 100644
--- a/src/ProtocolBuffers/Descriptors/FileDescriptor.cs
+++ b/src/ProtocolBuffers/Descriptors/FileDescriptor.cs
@@ -43,7 +43,7 @@ namespace Google.ProtocolBuffers.Descriptors {
   /// </summary>
   public sealed class FileDescriptor : IDescriptor<FileDescriptorProto> {
 
-    private readonly FileDescriptorProto proto;
+    private FileDescriptorProto proto;
     private readonly IList<MessageDescriptor> messageTypes;
     private readonly IList<EnumDescriptor> enumTypes;
     private readonly IList<ServiceDescriptor> services;
@@ -275,9 +275,9 @@ namespace Google.ProtocolBuffers.Descriptors {
       }
       for (int i = 0; i < proto.DependencyCount; i++) {
         if (dependencies[i].Name != proto.DependencyList[i]) {
-          /*throw new DescriptorValidationException(result,
+          throw new DescriptorValidationException(result,
             "Dependencies passed to FileDescriptor.BuildFrom() don't match " +
-            "those listed in the FileDescriptorProto.");*/
+            "those listed in the FileDescriptorProto.");
         }
       }
 
@@ -306,12 +306,89 @@ namespace Google.ProtocolBuffers.Descriptors {
     /// <summary>
     /// This method is to be called by generated code only.  It is equivalent
     /// to BuildFrom except that the FileDescriptorProto is encoded in
-    /// protocol buffer wire format.
+    /// protocol buffer wire format. This overload is maintained for backward
+    /// compatibility with source code generated before the custom options were available
+    /// (and working).
     /// </summary>
+    public static FileDescriptor InternalBuildGeneratedFileFrom(byte[] descriptorData, FileDescriptor[] dependencies) {
+      return InternalBuildGeneratedFileFrom(descriptorData, dependencies, x => null);
+    }
+
+    /// <summary>
+    /// This delegate should be used by generated code only. When calling
+    /// FileDescriptor.InternalBuildGeneratedFileFrom, the caller can provide
+    /// a callback which assigns the global variables defined in the generated code
+    /// which point at parts of the FileDescriptor. The callback returns an
+    /// Extension Registry which contains any extensions which might be used in
+    /// the descriptor - that is, extensions of the various "Options" messages defined
+    /// in descriptor.proto. The callback may also return null to indicate that
+    /// no extensions are used in the descriptor.
+    /// </summary>
+    /// <param name="descriptor"></param>
+    /// <returns></returns>
+    public delegate ExtensionRegistry InternalDescriptorAssigner(FileDescriptor descriptor);
+
     public static FileDescriptor InternalBuildGeneratedFileFrom(byte[] descriptorData,
-        FileDescriptor[] dependencies) {
-      FileDescriptorProto proto = FileDescriptorProto.ParseFrom(descriptorData);
-      return BuildFrom(proto, dependencies);      
+      FileDescriptor[] dependencies,InternalDescriptorAssigner descriptorAssigner) {
+      
+      FileDescriptorProto proto;
+      try {
+        proto = FileDescriptorProto.ParseFrom(descriptorData);
+      } catch (InvalidProtocolBufferException e) {
+        throw new ArgumentException("Failed to parse protocol buffer descriptor for generated code.", e);
+      }
+
+      FileDescriptor result;
+      try {
+        result = BuildFrom(proto, dependencies);
+      } catch (DescriptorValidationException e) {
+        throw new ArgumentException("Invalid embedded descriptor for \"" + proto.Name + "\".", e);
+      }
+
+      ExtensionRegistry registry = descriptorAssigner(result);
+
+      if (registry != null) {
+        // We must re-parse the proto using the registry.
+        try {
+          proto = FileDescriptorProto.ParseFrom(descriptorData, registry);
+        } catch (InvalidProtocolBufferException e) {
+          throw new ArgumentException("Failed to parse protocol buffer descriptor for generated code.", e);
+        }
+
+        result.ReplaceProto(proto);
+      }
+      return result;
+    }
+
+
+    /// <summary>
+    /// Replace our FileDescriptorProto with the given one, which is
+    /// identical except that it might contain extensions that weren't present
+    /// in the original. This method is needed for bootstrapping when a file
+    /// defines custom options. The options may be defined in the file itself,
+    /// so we can't actually parse them until we've constructed the descriptors,
+    /// but to construct the decsriptors we have to have parsed the descriptor
+    /// protos. So, we have to parse the descriptor protos a second time after
+    /// constructing the descriptors.
+    /// </summary>
+    private void ReplaceProto(FileDescriptorProto newProto) {
+      proto = newProto;
+
+      for (int i = 0; i < messageTypes.Count; i++) {
+        messageTypes[i].ReplaceProto(proto.GetMessageType(i));
+      }
+
+      for (int i = 0; i < enumTypes.Count; i++) {
+        enumTypes[i].ReplaceProto(proto.GetEnumType(i));
+      }
+
+      for (int i = 0; i < services.Count; i++) {
+        services[i].ReplaceProto(proto.GetService(i));
+      }
+
+      for (int i = 0; i < extensions.Count; i++) {
+        extensions[i].ReplaceProto(proto.GetExtension(i));
+      }
     }
   }
 }
diff --git a/src/ProtocolBuffers/Descriptors/MessageDescriptor.cs b/src/ProtocolBuffers/Descriptors/MessageDescriptor.cs
index 17ad37fd..cdd75a0c 100644
--- a/src/ProtocolBuffers/Descriptors/MessageDescriptor.cs
+++ b/src/ProtocolBuffers/Descriptors/MessageDescriptor.cs
@@ -29,6 +29,7 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+using System;
 using System.Collections.Generic;
 using Google.ProtocolBuffers.DescriptorProtos;
 
@@ -123,6 +124,15 @@ namespace Google.ProtocolBuffers.Descriptors {
     }
 
     /// <summary>
+    /// Finds a field by field name.
+    /// </summary>
+    /// <param name="name">The unqualified name of the field (e.g. "foo").</param>
+    /// <returns>The field's descriptor, or null if not found.</returns>
+    public FieldDescriptor FindFieldByName(String name) {
+      return File.DescriptorPool.FindSymbol<FieldDescriptor>(FullName  + "." + name);
+    }
+
+    /// <summary>
     /// Finds a field by field number.
     /// </summary>
     /// <param name="number">The field number within this message type.</param>
@@ -132,6 +142,22 @@ namespace Google.ProtocolBuffers.Descriptors {
     }
 
     /// <summary>
+    /// Finds a field by its property name, as it would be generated by protogen.
+    /// </summary>
+    /// <param name="propertyName">The property name within this message type.</param>
+    /// <returns>The field's descriptor, or null if not found.</returns>
+    public FieldDescriptor FindFieldByPropertyName(string propertyName) {
+      // For reasonably short messages, this will be more efficient than a dictionary
+      // lookup. It also means we don't need to do things lazily with locks etc.
+      foreach (FieldDescriptor field in Fields) {
+        if (field.CSharpOptions.PropertyName == propertyName) {
+          return field;
+        }
+      }
+      return null;
+    }
+
+    /// <summary>
     /// Finds a nested descriptor by name. The is valid for fields, nested
     /// message types and enums.
     /// </summary>
@@ -198,5 +224,28 @@ namespace Google.ProtocolBuffers.Descriptors {
       }
       return false;
     }
+
+    /// <summary>
+    /// See FileDescriptor.ReplaceProto
+    /// </summary>
+    internal override void ReplaceProto(DescriptorProto newProto) {
+      base.ReplaceProto(newProto);
+
+      for (int i = 0; i < nestedTypes.Count; i++) {
+        nestedTypes[i].ReplaceProto(newProto.GetNestedType(i));
+      }
+
+      for (int i = 0; i < enumTypes.Count; i++) {
+        enumTypes[i].ReplaceProto(newProto.GetEnumType(i));
+      }
+
+      for (int i = 0; i < fields.Count; i++) {
+        fields[i].ReplaceProto(newProto.GetField(i));
+      }
+
+      for (int i = 0; i < extensions.Count; i++) {
+        extensions[i].ReplaceProto(newProto.GetExtension(i));
+      }
+    }
   }
 }
diff --git a/src/ProtocolBuffers/Descriptors/ServiceDescriptor.cs b/src/ProtocolBuffers/Descriptors/ServiceDescriptor.cs
index 1a84e850..349b756d 100644
--- a/src/ProtocolBuffers/Descriptors/ServiceDescriptor.cs
+++ b/src/ProtocolBuffers/Descriptors/ServiceDescriptor.cs
@@ -72,5 +72,12 @@ namespace Google.ProtocolBuffers.Descriptors {
         method.CrossLink();
       }
     }
+
+    internal override void ReplaceProto(ServiceDescriptorProto newProto) {
+      base.ReplaceProto(newProto);
+      for (int i = 0; i < methods.Count; i++) {
+        methods[i].ReplaceProto(newProto.GetMethod(i));
+      }
+    }
   }
 }