private string SendCommand(string IpAddress, int port, string Data) { string Result = ""; try { //Data = "51AC032803"; //Data = Common.TrackingCRCCalculate(Data); //Data = Common.GetTrackingCommand(Data); string Err = ""; string ReadData = ""; for (int i = 0; i < 3; i++) { UDP.ATC_Tracking(IpAddress, port, Data, ref ReadData, ref Err); } } catch (Exception ex) { Result = ex.Message; } return(Result); }