Interaction logic for Window2.xaml
Inheritance: System.Windows.Window, ITestWindow
 public void OnClicked(Object sender, RoutedEventArgs args)
 {
     if (sender == _button1)
     {
         Window1 win = new Window1();
         win.Show();
     }
     else if (sender == _button2)
     {
         Window2 win = new Window2();
         win.Show();
     }
     else
     {
         Window3 win = new Window3();
         win.Show();
     }
 }