Thread t2 = new Thread(() =>
            {
                MyWindow = new MyWindow();
                MyWindow.Show();
                MyWindow.Closed += (sender2, e2) => MyWindow.Dispatcher.InvokeShutdown();
                MyWindow.dgr1.ItemsSource = Source1;
                MyWindow.dgr2.ItemsSource = Source2;
                System.Windows.Threading.Dispatcher.Run();
            });
            t2.IsBackground = true;
            t2.Name = "MyWindow Thread";
            t2.SetApartmentState(ApartmentState.STA);
            t2.Start();