title: moq internal interface in Silverlight 4. "Can not create proxy for types that are not accessible."
body: <p>I try to mock an internal interface in Silverlight 4, using moq-silverlight 4.0.10827.0.</p>
  
  <p>I get an error "Can not create proxy for types that are not accessible." in a Castle.DynamicProxy.Generators.GeneratorException.</p>
  
  <p>I have [assembly: InternalsVisibleTo("DynamicProxyGenAssembly2")] in the assemblyInfo of the tested assembly. I do not have any signed assemblies.</p>