private void InstallButton_Click(object sender, RoutedEventArgs e)
{
var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
if ((bool)localSettings.Values[appHolding.Name]) return;
localSettings.Values[appHolding.Name] = true;
AppList.getMyAppList().myappList.Add(appHolding);
btnMyApps.Visibility = Visibility.Visible;
var toastTemplate = ToastTemplateType.ToastImageAndText01;
var toastXml = ToastNotificationManager.GetTemplateContent(toastTemplate);
var toastTextElements = toastXml.GetElementsByTagName("text");
toastTextElements[0].AppendChild(toastXml.CreateTextNode(appHolding.Name + " is installed."));
var toast = new ToastNotification(toastXml);
ToastNotificationManager.CreateToastNotifier().Show(toast);
}