title: What is the difference between WCF and the RIA Services Domain Service Class?
body: <p>I'm just introducing myself to the basic differences between Silverlight 3 and it's predecessor.  Looking at Domain Service Class within RIA services, the execution seems quite a bit simplified.  Can someone explain the basic differences between this and Windows Communication Foundation?  </p>
  
  <p>Does the Domain Service Class employ WCF or some other services framework in the background, or is this new from the ground up?</p>