title: linq to sql domain context not visible to domain service class
body: <p>I'm creating a silverlight 4 application (using the Business Application template).  I generated Linq to SQL classes for my tables in the .web project and want to use RIA services.  When I add the domain service class to the .web project the data context for the Linq to SQL classes isn't available to choose.</p>
  
  <p>According to the documentation creating the Linq to SQL classes and building the project is all that is required.  This works if I try using Entity Framework classes but not Linq to SQL.  There are several examples available using Linq to SQL and none mention any other requirements.</p>
  
  <p>I have tried several projects, VB, C#, different computers, the result has been the same.</p>
  
  <p>Thanks for any advice on how to get this working!</p>