public static byte[] FinalizeProtoBuf(object proto, ushort packetid)
        {
            byte[] protobuff;
            using (var ms = new System.IO.MemoryStream())
            {
                ProtoBuf.Serializer.Serialize(ms, proto);
                protobuff = ms.ToArray();
                byte[] buffer;
                buffer = new byte[12 + protobuff.Length];
                System.Buffer.BlockCopy(protobuff, 0, buffer, 4, protobuff.Length);
                Writer.Write(buffer.Length - 8, 0, buffer);
                Writer.Write(packetid, 2, buffer);
                return buffer;
            }
        }