private void Unsubscribe(IEnumerable <Song> songs)
{
foreach (Song song in songs ?? Enumerable.Empty <Song>())
{
CurrentSong.Unsubscribe(song);
OtherSongs.Unsubscribe(song);
AllSongs.Unsubscribe(song);
}
}
private void OnCurrentSongChanged(object sender, CurrentSongChangedEventArgs e)
{
CurrentSong.Unsubscribe(e.OldCurrentSong);
CurrentSong.Subscribe(e.NewCurrentSong);
OtherSongs.Unsubscribe(e.NewCurrentSong);
OtherSongs.Subscribe(e.OldCurrentSong);
CurrentSongChanged?.Invoke(this, new SubscriptionsEventArgs <IPlaylist, CurrentSongChangedEventArgs>(sender, e));
}
