private void RemoveSongFromPlaylist(object obj) { if (SelectedOldSong == null) { return; } PlaceholderSongs.Remove(SelectedOldSong); OnPropertyChanged("PlaceholderSongs"); }
private void AddSongToPlaylist(object obj) { if (SelectedNewSong == null || PlaceholderSongs.IndexOf(SelectedNewSong) != -1) { return; } PlaceholderSongs.Add(SelectedNewSong); OnPropertyChanged("PlaceholderSongs"); }