在WPF中切换到全屏模式后如何保持大小？

this.WindowState = WindowState.Maximized;
this.WindowStyle = WindowStyle.None;

private double initialWidth;
private double initialHeight;

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    initialWidth = this.ActualWidth;
    initialHeight = this.ActualHeight;
}

this.WindowState = WindowState.Normal;
this.WindowStyle = WindowStyle.SingleBorderWindow;
this.Width = initialWidth;
this.Height = initialHeight;