// Clear(delete) all pages private void Button_Click_4(object sender, RoutedEventArgs e) { p1 = null; p2 = null; p3 = null; Main.Content = null; }
private void Button_Click_3(object sender, RoutedEventArgs e) { if (p3 == null) { p3 = new Page3(); } Main.Content = p3.Content; }