1 files changed, 8 insertions, 0 deletions
diff --git a/csharp/ProtocolBuffers/Descriptors/MessageDescriptor.cs b/csharp/ProtocolBuffers/Descriptors/MessageDescriptor.cs
index 4e0834f0..df2972f6 100644
--- a/csharp/ProtocolBuffers/Descriptors/MessageDescriptor.cs
+++ b/csharp/ProtocolBuffers/Descriptors/MessageDescriptor.cs
@@ -6,5 +6,13 @@ namespace Google.ProtocolBuffers.Descriptors {
     public IList<FieldDescriptor> Fields;
     public DescriptorProtos.MessageOptions Options;
     public string FullName;
+
+    internal bool IsExtensionNumber(int fieldNumber) {
+      throw new System.NotImplementedException();
+    }
+
+    internal FieldDescriptor FindFieldByNumber(int fieldNumber) {
+      throw new System.NotImplementedException();
+    }
   }
 }