protected override void OnNavigatedTo(NavigationEventArgs e) { if (e.Uri.ToString() == "/../../Niveles.xaml") { NavigationService.RemoveBackEntry(); NavigationService.RemoveBackEntry(); } else if (e.Uri.ToString() == "/../Niveles.xaml") { NavigationService.RemoveBackEntry(); NavigationService.RemoveBackEntry(); } Recursos recurso = new Recursos(); recurso.pararSonido(); base.OnNavigatedTo(e); }