MissionPlanner.MainV2.CMB_serialport_SelectedIndexChanged C# (CSharp) Method

        private void CMB_serialport_SelectedIndexChanged(object sender, EventArgs e)
        {
            comPortName = _connectionControl.CMB_serialport.Text;
            if (comPortName == "UDP" || comPortName == "UDPCl" || comPortName == "TCP" || comPortName == "AUTO")
            {
                _connectionControl.CMB_baudrate.Enabled = false;
                if (comPortName == "TCP")
                    MainV2.comPort.BaseStream = new TcpSerial();
                if (comPortName == "UDP")
                    MainV2.comPort.BaseStream = new UdpSerial();
                if (comPortName == "UDPCl")
                    MainV2.comPort.BaseStream = new UdpSerialConnect();
                if (comPortName == "AUTO")
                {
                    MainV2.comPort.BaseStream = new SerialPort();
                    return;
                }
            }
            else
            {
                _connectionControl.CMB_baudrate.Enabled = true;
                MainV2.comPort.BaseStream = new SerialPort();
            }

            try
            {
                if (!String.IsNullOrEmpty(_connectionControl.CMB_serialport.Text))
                    comPort.BaseStream.PortName = _connectionControl.CMB_serialport.Text;

                MainV2.comPort.BaseStream.BaudRate = int.Parse(_connectionControl.CMB_baudrate.Text);

                // check for saved baud rate and restore
                if (Settings.Instance[_connectionControl.CMB_serialport.Text + "_BAUD"] != null)
                {
                    _connectionControl.CMB_baudrate.Text =
                        Settings.Instance[_connectionControl.CMB_serialport.Text + "_BAUD"];
                }
            }
            catch
            {
            }
        }