private void nextwindowButton_Click(object sender, RoutedEventArgs e)
 {
     NewSeatWindow main = new NewSeatWindow();
     main.Show();
     this.Close();
 }
 private void NewSeatEntry_Click(object sender, RoutedEventArgs e)
 {
     NewSeatWindow main = new NewSeatWindow();
     main.Show();
     //this.Close();
 }