Public Function WithFilter( _
   ByVal exportFilter As Func(Of Export,Boolean) _
) As CompositionContext

Dim instance As CompositionContext
Dim exportFilter As Func(Of Export,Boolean)
Dim value As CompositionContext
 
value = instance.WithFilter(exportFilter)

public CompositionContext WithFilter( 
   Func<Export,bool> exportFilter
)

public:
CompositionContext^ WithFilter( 
   Func<Export^,bool>^ exportFilter
) 

public class CompositionContextResolver : BaseCompositionContextResolver {

  public override CompositionContext GetCompositionContext(string compositionContextName) {

    // Creates a new context from the Default context, with global metadata filtering.
    if (compositionContextName == "Mock") {
      var filter = CompositionContext.BuildExportFilter("IsMock", true);
      return CompositionContext.Default
         .WithFilter(filter)
         .WithName("Mock");
    } else {
      return base.GetCompositionContext(compositionContextName);
    }
  }
}

[InheritedExport(typeof(EntityServerQueryInterceptor))]
[ExportMetadata("IsMock", true)]
public class MockEntityServerQueryInterceptor : EntityServerQueryInterceptor {

  protected override bool ExecuteQuery() {
    throw new InvalidOperationException();
  }
}