public PlaybackViewService(Action soundEndsAction)
        {
            this.unitOfWork = new UnitOfWork();

            if (soundEndsEventSubscribed == false)
            {
                QueuePlaybackService.Instance().SoundPlaybackService.SoundEnds += new SoundEndsEventHandler((object sender, EventArgs e) => soundEndsAction());
                soundEndsEventSubscribed = true;
            }
        }
 public SoundViewService()
 {
     this.unitOfWork = new UnitOfWork();
 }