title: Add Service Reference not appearing
body: <p>In a Windows Phone 7 Silverlight project, I had a service reference to a WCF service.  This morning when I opened up the project, suddenly the namespaces for my WCF service were unknown.  The option for "Update Service Reference" in Solution Explorer was not there, so I deleted the Service Reference with the intent of re-adding it.  But the option for "Add Service Reference" is also not there.  Gone.  Disappeared.</p>
  
  <p>Closed and re-opened the solution.  Restarted VS2010 Ultimate.  No dice.  Anyone run across this?</p>