protected override void OnNavigatedTo(NavigationEventArgs e)
 {
     base.OnNavigatedTo(e);
     oldGame = (WishlistGame)e.Parameter;
     game_title_textbox.Text         = oldGame.GameTitle;
     system_combobox.ItemsSource     = systems;
     system_combobox.SelectedItem    = oldGame.System;
     system_combobox.PlaceholderText = oldGame.System;
     datePicker.Date = Convert.ToDateTime(oldGame.ReleaseDate);
 }
 private void MySelectionChanged(object sender, SelectionChangedEventArgs e)
 {
     gameClicked = (WishlistGame)e.AddedItems[0];
     this.Frame.Navigate(typeof(EditWishlistGame), gameClicked);
 }