private void FavoriteButton_Click(object sender, RoutedEventArgs e) { var button = sender as Button; Song favSong = (Song)button.DataContext; SongManager.AddFavoriteSong(favSong); if (SongTextBlock.Text == "Favorite Songs") { SongManager.GetFavoriteSongs(songs); } else if (SongTextBlock.Text == "All Songs") { SongManager.GetAllSongs(songs); } }