WPF - zmiana kursora myszki po wywołaniu nowego wątku

 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this.Cursor = Cursors.Wait;            
            
            Thread newWindowThread = new Thread(new ThreadStart(() =>
            {                
                Window1 tempWindow = new Window1();
                Thread.Sleep(2000);
                tempWindow.Show();
                System.Windows.Threading.Dispatcher.Run();                
            }));

            newWindowThread.SetApartmentState(ApartmentState.STA);
            newWindowThread.IsBackground = true;
            newWindowThread.Start();

            this.Cursor = Cursors.Arrow;
        }
    }