private string GetPortNumber()
        {
            using (ManagementObjectSearcher searcher =
                 new ManagementObjectSearcher("root\CIMV2",
                 "SELECT * FROM Win32_PnPEntity where caption like '%COM%' AND PNPDeviceID LIKE '%VID_05E0&PID_1701%' "))
            {
                string portNumber = "";

                foreach (ManagementObject queryObj in searcher.Get())
                {

                    string portName = (string)queryObj["Caption"];

                    if (portName.Contains("COM"))
                    {
                        portName = portName.Substring(portName.IndexOf('('));
                        portName = portName.Remove(portName.Length - 1);
                        portName = portName.Remove(0, 1);

                        portNumber = portName;
                    }
                }

                return portNumber;
            }
        }