Added IDisposable to ICodedOutputStream
diff --git a/src/ProtocolBuffers/ICodedOutputStream.cs b/src/ProtocolBuffers/ICodedOutputStream.cs
index 861d3fe..2c32479 100644
--- a/src/ProtocolBuffers/ICodedOutputStream.cs
+++ b/src/ProtocolBuffers/ICodedOutputStream.cs
@@ -49,7 +49,7 @@
     /// in their binary form by creating a instance via the CodedOutputStream.CreateInstance

     /// static factory.

     /// </summary>

-    public interface ICodedOutputStream

+    public interface ICodedOutputStream : IDisposable

     {

         /// <summary>

         /// Indicates that all temporary buffers be written to the final output.