Symphonary.NWGUI.HandleMIDIPreviewPlayingCompleted C# (CSharp) Метод

        private void HandleMIDIPreviewPlayingCompleted(object sender, EventArgs e)
        {
            Dispatcher.BeginInvoke(DispatcherPriority.Normal,
                                   new Action(delegate() {
                                                      previewChannelButton.Foreground
                                                          = Brushes.Black;
                                                  }));
        }