1 files changed, 20 insertions, 3 deletions
diff --git a/csharp/ProtocolBuffers/Descriptors/EnumDescriptor.cs b/csharp/ProtocolBuffers/Descriptors/EnumDescriptor.cs
index a28efc5f..83090236 100644
--- a/csharp/ProtocolBuffers/Descriptors/EnumDescriptor.cs
+++ b/csharp/ProtocolBuffers/Descriptors/EnumDescriptor.cs
@@ -1,10 +1,27 @@
-
-using System;
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.
+// http://code.google.com/p/protobuf/
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 using System.Collections.Generic;
 using Google.ProtocolBuffers.DescriptorProtos;
+
 namespace Google.ProtocolBuffers.Descriptors {
 
-  public class EnumDescriptor : IndexedDescriptorBase<EnumDescriptorProto, EnumOptions> {
+  /// <summary>
+  /// Descriptor for an enum type in a .proto file.
+  /// </summary>
+  public sealed class EnumDescriptor : IndexedDescriptorBase<EnumDescriptorProto, EnumOptions> {
 
     private readonly MessageDescriptor containingType;
     private readonly IList<EnumValueDescriptor> values;