Refactoring of CodedInputStream.Read??? to use boolean return with out param.
diff --git a/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs b/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs
index 26eb96a..0e890f3 100644
--- a/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs
+++ b/src/ProtocolBuffers.Test/TestProtos/UnitTestImportLiteProtoFile.cs
@@ -218,11 +218,11 @@
               if (pb::WireFormat.IsEndGroupTag(tag)) {

                 return this;

               }

-              ParseUnknownField(input, extensionRegistry, tag);

+              ParseUnknownField(input, extensionRegistry, tag, field_name);

               break;

             }

             case 8: {

-              D = input.ReadInt32();

+              result.hasD |= input.ReadInt32(ref result.d_);

               break;

             }

           }