private void ShowAlienLanguageButton_Click(object sender, RoutedEventArgs e)
        {
            if (AlienLanguageWindow == null)
            {
                AlienLanguageWindow = new AlienLanguageGui.MainWindow();
            }

            AlienLanguageWindow.Show();
        }
        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (Application.Current != null)
            {
                AlienLanguageWindow = null;
                DuckMigrationWindow = null;

                Application.Current.Shutdown();
            }
        }
 public MainWindow()
 {
     InitializeComponent();
     DuckMigrationWindow = null;
     AlienLanguageWindow = null;
 }