BTool.CommManager.WriteData C# (CSharp) Method

        public bool WriteData(string msg)
        {
            bool flag = true;
            if (!ComPort.IsOpen && !OpenPort())
                return false;
            switch (CurrentTransmissionType)
            {
                case CommManager.TransmissionType.Text:
                    try
                    {
                        ComPort.Write(msg);
                        if (DisplayMsgCallback != null)
                            DisplayMsgCallback(SharedAppObjs.MsgType.Outgoing, msg + "\n");
                    }
                    catch (Exception ex)
                    {
                        msgBox.UserMsgBox(SharedObjects.MainWin, MsgBox.MsgTypes.Error, string.Format("Error Writing To {0:S} (Text)\n" + ex.Message + "\n", ComPort.PortName));
                        flag = false;
                    }
                    break;
                case CommManager.TransmissionType.Hex:
                    try
                    {
                        byte[] buffer = HexToByte(msg);
                        try
                        {
                            ComPort.Write(buffer, 0, buffer.Length);
                        }
                        catch (Exception ex)
                        {
                            string msg_ex = string.Format("Error Writing To {0:S} (Hex)\n" + ex.Message + "\n", ComPort.PortName);
                            if (DisplayMsgCallback != null)
                                DisplayMsgCallback(SharedAppObjs.MsgType.Error, msg_ex);
                            msgBox.UserMsgBox(SharedObjects.MainWin, MsgBox.MsgTypes.Error, msg_ex);
                            flag = false;
                        }
                    }
                    catch (Exception ex)
                    {
                        string msg_ex = string.Format("Com Port Error\n Port Number = {0:S} (Hex)\n" + ex.Message + "\n", ComPort.PortName);
                        if (DisplayMsgCallback != null)
                            DisplayMsgCallback(SharedAppObjs.MsgType.Error, msg_ex);
                        msgBox.UserMsgBox(SharedObjects.MainWin, MsgBox.MsgTypes.Error, msg_ex);
                        flag = false;
                    }
                    break;
                default:
                    try
                    {
                        ComPort.Write(msg);
                    }
                    catch (Exception ex)
                    {
                        string msg_ex = string.Format("Error Writing To {0:S} (Default)\n" + ex.Message + "\n", ComPort.PortName);
                        if (DisplayMsgCallback != null)
                            DisplayMsgCallback(SharedAppObjs.MsgType.Error, msg_ex);
                        msgBox.UserMsgBox(SharedObjects.MainWin, MsgBox.MsgTypes.Error, msg_ex);
                        flag = false;
                    }
                    break;
            }
            return flag;
        }