Vista - Help with IClientMessageFormatter

I am implementing this interface to implement message compression - so I
need to deserialize the response.

However, by implementing this interface and assigning that class to be the
Formatter by the operation, I now also need to write the implementation of
the SerializeRequest method.

Well, I don't want to! Whatever WCF is doing is just fine by me - how do I
call that default implementation? I don't want to have to be responsible for
creating the entire message and setting everything just right. Someone in MS
already wrote that functionality, and I just want to use it.

What can I call to do that for me?