Symphonary.NWGUI.HandleMIDILoadCompleted C# (CSharp) Method

        private void HandleMIDILoadCompleted(object sender, AsyncCompletedEventArgs e)
        {
            try {
                loadingScreen.Visibility = Visibility.Hidden;
            } catch (NullReferenceException ex) { }

            channelSelector.Refresh(ref midiInfo, i_Channel);

            // if the serial port is not closed, opening once again (SerialPortSelector opens ports for testing)
            // will cause an exception
            serialPort.Close();
            serialPortSelector.Refresh(s_SelectedSerialPort);
            Instruments.Header = "INSTRUMENTS";
            //muteSelectedChannel.Width = Double.NaN;
            //muteSelectedChannel.Header = "MUTE";
            Instruments.Width = Double.NaN;
            listViewGrid.Visibility = Visibility.Visible;

            midiPlayer.EnterPreviewMode(HandleMIDIPreviewPlayingCompleted);
        }