title: protobuf and List<object> - how to serialize / deserialize?
body: <p>I have a <code>List&lt;object&gt;</code> with different types of objects in it like integers, strings, and custom types. All custom types are protobuf-adjusted.
  What I wanna do now is to serialize / deserialize this list with protobuf.net. Up until now I suspect that I have to declare each and every type explicitly, which is unfortunately not possible with these mixed-list constructs. Because the binary formater has no problems to do these things I hope that I missed something and that you can help me out.
  So my question is how to deal with objects in protobuf.net.</p>