public static ImportModelWindow GetInstance()
        {
            if (staticInstance == null)
            {
                staticInstance = new ImportModelWindow();
            }

            return staticInstance;
        }
        public static ImportModelWindow GetInstance()
        {
            if (staticInstance == null)
            {
                staticInstance = new ImportModelWindow();
            }

            return(staticInstance);
        }
 private void ImportModel_Click(object sender, RoutedEventArgs e)
 {
     ImportModelWindow.GetInstance().ShowDialog();
 }
 private void WindowOnClosed(object sender, System.EventArgs e)
 {
     staticInstance = null;
 }
 private void WindowOnClosed(object sender, System.EventArgs e)
 {
     staticInstance = null;
 }