public void UserSuppliedDispatcher ()
		{
			Assert.Throws<ArgumentNullException> (delegate {
				new DispatcherSynchronizationContext (null);
			}, ".ctor(null)");

			Dispatcher d = Application.Current.RootVisual.Dispatcher;
			DispatcherSynchronizationContext dsc = new DispatcherSynchronizationContext (d);
			Assert.AreNotSame (dsc, dsc.CreateCopy (), "CreateCopy");
		}
		public void Default ()
		{
			DispatcherSynchronizationContext dsc = new DispatcherSynchronizationContext ();
			Assert.AreNotSame (dsc, dsc.CreateCopy (), "CreateCopy");
		}