title: DomainService: .Include() on client
body: <p>is there any possibility to include sub entities in my query on the client?
  I'm working on a Silverlight application using RIA Services, a DomainService and EntityFramework behind it for my database access.
  In Order to get associated entities when calling the DomainService for data, I have to modify the DomainService' metadata with the [Include] attribute and use the Include() method on the DomainService.
  <em>(e. g. ObjectContext.Parent.Include("Child"))</em></p>
  
  <p>However, I feel like ending up with a ton of methods for each entity in my DomainService to get all different combinations of associated data, because sometimes I'll need a <em>user</em> and the associated <em>role</em>, sometimes I only want to get the user without any associated data and so on...</p>
  
  <p>According to some RIA tutorials, it is recommended to use the functionality given by Expression Trees to modify a query on the client side.
  Is there any way of including on the client instead of the DomainService' get-method? 
  I feel like this must be a common issue when working with DomanServices?!</p>
  
  <p>During my research, I stumbled over a similar question but without any answer and another thread where someone said it is not possible. But that answer was posted around April 2009 and there have been a lot of changes in the development since then.</p>
  
  <p>Thanks</p>