private void Delete(object sender, RoutedEventArgs e)
 {
     if (!Lists.SelectedList.IsNew)
     {
         Lists.DeleteSelectedList();
     }
     else
     {
         App.ShowMessage("You can't do this on a new list");
     }
 }
 private void Send(object sender, RoutedEventArgs e)
 {
     if (!Lists.SelectedList.IsNew)
     {
         Lists.SelectedList.SendInvitations();
     }
     else
     {
         App.ShowMessage("You can't do this on a new list");
     }
 }