public HaMusicPlayerManager(IHaMusicPlayer player, MainForm mainForm, int volume)
 {
     this.player = player;
     this.mainForm = mainForm;
     this.volume = volume;
     this.player.SongEnded += Player_SongEnded;
 }
 public HaMusicPlayerManager(IHaMusicPlayer player, MainForm mainForm, int volume)
 {
     this.player            = player;
     this.mainForm          = mainForm;
     this.volume            = volume;
     this.player.SongEnded += Player_SongEnded;
 }