1 files changed, 58 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/Collections/IPopsicleList.cs b/csharp/src/ProtocolBuffers/Collections/IPopsicleList.cs
new file mode 100644
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+++ b/csharp/src/ProtocolBuffers/Collections/IPopsicleList.cs
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// 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.Collections.Generic;
+
+namespace Google.ProtocolBuffers.Collections
+{
+    /// <summary>
+    /// A list which has an Add method which accepts an IEnumerable[T].
+    /// This allows whole collections to be added easily using collection initializers.
+    /// It causes a potential overload confusion if T : IEnumerable[T], but in
+    /// practice that won't happen in protocol buffers.
+    /// </summary>
+    /// <remarks>This is only currently implemented by PopsicleList, and it's likely
+    /// to stay that way - hence the name. More genuinely descriptive names are
+    /// horribly ugly. (At least, the ones the author could think of...)</remarks>
+    /// <typeparam name="T">The element type of the list</typeparam>
+    public interface IPopsicleList<T> : IList<T>
+    {
+        void Add(IEnumerable<T> collection);
+    }
+
+    /// <summary>
+    /// Used to efficiently cast the elements of enumerations
+    /// </summary>
+    internal interface ICastArray
+    {
+        IEnumerable<TItemType> CastArray<TItemType>();
+    }
+}
+\ No newline at end of file