C# convert message data to byte array in protobuf encoding

[Matrix Guo]

using pb = global::Google.Protobuf;

private static byte[] FormatToBinary(T obj)

 { 

           using (MemoryStream stream = new MemoryStream())

            {               

                pb::CodedOutputStream s = new pb::CodedOutputStream(stream);

                obj.WriteTo(s);

                //s.Flush();  //once I add it，the message could not be sent any more

                return stream.ToArray();

            }

}

the result return an array with 0 element.

once I add s.Flush(); the value will be changed,while the message could not be sent any more.

what I want to do is just converting message data to byte array in protobuf encoding with proto3

[Jon Skeet]

Just use the ToByteArray extension method... although if the code you've shown is returning an empty array, I'd expect ToByteArray to do so as well...