Symphonary.NWGUI.Back_Clicked C# (CSharp) Method

        private void Back_Clicked(object sender, RoutedEventArgs e)
        {
            //muteSelectedChannel.Width = 0;
            //muteSelectedChannel.Header = "";
            Instruments.Width = 0;
            Instruments.Header = "";
            listViewGrid.Visibility = Visibility.Hidden;
            midiPlayer.StopPlaying();
            normal.Visibility = Visibility.Visible;

            midiPlayer.ExitPreviewMode(HandleMIDIPreviewPlayingCompleted);
        }