System Parameters get/set

Hi!
I will get and set System Parameters like this in c#:

            this.Top = Properties.Settings.Default.Top;
            this.Left = Properties.Settings.Default.Left;
            this.Height = Properties.Settings.Default.Height;
            this.Width = Properties.Settings.Default.Width;
            this.Closing += MainWindow_Closing;

            // Bildschirmgröße anpassen falls zu klein!
            HOEHE = Convert.ToInt32(System.Windows.SystemParameters.PrimaryScreenHeight);
            BREITE = Convert.ToInt32(System.Windows.SystemParameters.PrimaryScreenWidth);

            if (BREITE < 1200)
            {
                this.Width = SystemParameters.PrimaryScreenWidth;
                this.MaxWidth = SystemParameters.PrimaryScreenWidth;
                this.WindowState = WindowState.Maximized;
            }

            if (HOEHE < 800)
            {
                this.Height = SystemParameters.PrimaryScreenHeight;
                this.MaxHeight = SystemParameters.PrimaryScreenHeight;
                this.WindowState = WindowState.Maximized;
            }

...

        private void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (WindowState == WindowState.Maximized)
            {
                Properties.Settings.Default.Top = RestoreBounds.Top;
                Properties.Settings.Default.Left = RestoreBounds.Left;
                Properties.Settings.Default.Height = RestoreBounds.Height;
                Properties.Settings.Default.Width = RestoreBounds.Width;
            }
            else
            {
                Properties.Settings.Default.Top = this.Top;
                Properties.Settings.Default.Left = this.Left;
                Properties.Settings.Default.Height = this.Height;
                Properties.Settings.Default.Width = this.Width;
            }
            Properties.Settings.Default.Save();
        }

Have anypne an idea for this?

Best Regards

Bernd