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    <p>No, this solution is hard to maintain in a long term.</p> <p>I recommend that you prepend the full name of the serialized type to the serialized data in the serialization process and read the type name in the beginning of the deserialization process (no need to change the protobuf source-code)</p> <p>As a side note, you should try to avoid mixing object types in the deserialization process. I'm assuming you are updating an existing .net application and can't re-design it.</p> <p>Update: Sample code</p> <pre><code>public byte[] Serialize(object myObject) { using (var ms = new MemoryStream()) { Type type = myObject.GetType(); var id = System.Text.ASCIIEncoding.ASCII.GetBytes(type.FullName + '|'); ms.Write(id, 0, id.Length); Serializer.Serialize(ms, myObject); var bytes = ms.ToArray(); return bytes; } } public object Deserialize(byte[] serializedData) { StringBuilder sb = new StringBuilder(); using (var ms = new MemoryStream(serializedData)) { while (true) { var currentChar = (char)ms.ReadByte(); if (currentChar == '|') { break; } sb.Append(currentChar); } string typeName = sb.ToString(); // assuming that the calling assembly contains the desired type. // You can include aditional assembly information if necessary Type deserializationType = Assembly.GetCallingAssembly().GetType(typeName); MethodInfo mi = typeof(Serializer).GetMethod("Deserialize"); MethodInfo genericMethod = mi.MakeGenericMethod(new[] { deserializationType }); return genericMethod.Invoke(null, new[] { ms }); } } </code></pre>
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    1. COI did not change the protobuf source code. The SimulatedObject can be put at the place of the DataContract where before an object was. The only difference is that you need to specify all expected types for the object in the SimulatedObject as generic constraint. Yes I am trying to convert a large existing codebase to protocol buffers. Normally I will not not need 10 different types but perhaps two or three. I wanted to check in my test the worst case.
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    2. COYou probably open an streamwriter when you are serializing the data. Just send the type FullName (typeof(<type>).FullName) and a separator (ie: "|") to the writer sending the serialized data. When reading the data, read the first bytes until you find the separator you chose. Now you now the serialized type and can deserialize your data withour further complications.
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    3. COWith Protocol Buffers this is not so easy since at deserialization time I need to pass to Serialize<T> a generic argument. If I do this dynamically I would need to revert back to Reflection to create the corresponding generic method with the correct type argument. I do not see how this is easier or faster than the current approach.
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