using System;
using System.IO.Ports;
namespace SerialComm {
  class SerialOut {
    static void Main ()
    {
      SerialPort com1 = new SerialPort( "COM12", 9600, Parity.None,
      8, StopBits.One );
      com1.Open (); 
      do
      {
        com1.WriteLine ( "Hello World!!!" );
        }
      while (!Console.KeyAvailable);
      com1.Close (); 
      }
    }
  }