Chirp.Radio.MainPage.Instance_PlayStateChanged C# (CSharp) Метод

        void Instance_PlayStateChanged(object sender, EventArgs e)
        {
            var playState = BackgroundAudioPlayer.Instance.PlayerState;
            switch (playState)
            {
                case PlayState.TrackReady:
                    Debug.WriteLine("Track ready");
                    break;
                case PlayState.BufferingStarted:
                    _viewModel.Busy = true;
                    Debug.WriteLine("Buffering");
                    break;
                case PlayState.BufferingStopped:
                    //_viewModel.Busy = false;
                    break;
                case PlayState.Paused:
                case PlayState.Stopped:
                    var playButton = ApplicationBar.Buttons[0] as ApplicationBarIconButton;
                    playButton.Text = "Play";
                    playButton.IconUri = new Uri("/Images/play.png", UriKind.Relative);
                    break;
                case PlayState.Playing:
                    _viewModel.Busy = false;
                    playButton = ApplicationBar.Buttons[0] as ApplicationBarIconButton;
                    playButton.Text = "Stop";
                    playButton.IconUri = new Uri("/Images/pause.png", UriKind.Relative);
                    break;
                default:
                    Debug.WriteLine(playState);
                    break;
            }
        }