title: WCF REST - Overriding incoming request data
body: <p>Is it possible to change the data of incoming HTTP request in WCF?</p>
  
  <p>I've already found out how to change HTTP method (using <code>IDispatchOperationSelector</code> and <code>HttpRequestMessageProperty</code> of the incoming message).</p>
  
  <p>I'm writing behavior that would enable to make "POST" requests using GET requests (with method and data stored in query string). I can override the HTTP method, but I can't find the solution to override the data. I need to load the data stored in query string and use them as HTTP body.</p>
  
  <p>Any thoughts?</p>