Hi -- I have a C++ library which sends protobuf messages over the network 
and I'd like to
provide a C# wrapper that allows the client application the ability to 
generate a protobuf,
pass it to native code and have the native code consume it directly.

Is the C# 'at rest' representation of a protobuf message compatible with a 
C++ layout
of the same message? That is, if I've created C# code that built a protobuf 
can I directly pass it somehow to C++ as a protobuf (if I could get the raw 
byte pointer
to the message), or do I have to first serialize it to a buffer, pass the 
serialized buffer
to C++ then deserialize it in C++?

I'd really like to avoid the deserialization/serialization on either side 
of the C#/C++
boundary for performance.

Thanks for any information or pointers!

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