WPF怎么在主窗体嵌入子窗体和让子窗体全屏？

        private void Button_Click_1(object sender, RoutedEventArgs e)

        {

            this.Topmost = true;

            this.WindowStyle = System.Windows.WindowStyle.None;

            this.WindowState = System.Windows.WindowState.Maximized;



            

        }



        private void FillScene(object sender, KeyEventArgs e)

        {

            if (e.Key == Key.Escape)//Esc键  

            {

                this.WindowState = System.Windows.WindowState.Normal;

                this.WindowStyle = System.Windows.WindowStyle.SingleBorderWindow;

            }

        }