private void PopulateSerialportList()
{
_connectionControl.CMB_serialport.Items.Clear();
_connectionControl.CMB_serialport.Items.Add("AUTO");
_connectionControl.CMB_serialport.Items.AddRange(SerialPort.GetPortNames());
_connectionControl.CMB_serialport.Items.Add("TCP");
_connectionControl.CMB_serialport.Items.Add("UDP");
_connectionControl.CMB_serialport.Items.Add("UDPCl");
}