public static bool WriteToSerialPort(byte[]byteArr)    {      SerialPort Com = newSerialPort();      try      {        Com.ReadTimeout = 5000;        Com.WriteTimeout = 5000;        Com.PortName = "Com1";        Com.BaudRate = 9600;        Com.StopBits = StopBits.One;        Com.Parity = Parity.None;        Com.Open();        Com.Write(byteArr, 0,byteArr.Length);        return true;      }      catch(Exception ex)      {        return false;      }      finally      {        Com.Close();      }          }