title: Accept and Return file to/from C# WebService
body: <p>How do I create a WebService in C# that will <strong>accept</strong> File and then <strong>return</strong> a File at the same time in one call (Synchronous).
  What I'm trying to do is to create a WebService that will accept and MS Office document, convert that document to PDF and then return that file back to the caller (in my case I'm using Java for the client)</p>