C#: Crosscontext calls in WPF

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public static class DispatcherObjectExtensions{  public static TRet myInvoke(this T source, Func func)  where T:DispatcherObject {   return (TRet)source.Dispatcher.Invoke(func);  }  public static void myInvoke(this T source, Action act) where T:DispatcherObject {   source.Dispatcher.Invoke(act);  } }

This will put these two extension methods on all DispatcherObject descendants (like System.Windows.Window), and you can call a delegate put in the object's thread/context.