Need Help in reading data from Com Port

using System;
using System.IO.Ports;
using System.Text;

namespace SerialPortExample
{
    class SerialPortProgram
    {
        // Create the serial port with basic settings
        SerialPort port = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);

        [STAThread]
        static void Main(string[] args)
        {


            new SerialPortProgram();
        }

        private SerialPortProgram()
        {


           

            // Instatiate this class
            Console.WriteLine("Incoming Data:");


            port.DataReceived += new SerialDataReceivedEventHandler
(port_DataReceived);
            port.ErrorReceived += new SerialErrorReceivedEventHandler
(port_ErrorReceived);
            port.Open();
            port.Write("TEst1");
           Console.WriteLine(port.ReadExisting ());
            port.Close();
            System.Console.ReadKey();

            port.Close();
        }

        private void port_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            //Show all the incoming data in the port's buffer
            Console.WriteLine("Character received");
            Console.WriteLine(port.ReadExisting());
        }


        private void port_ErrorReceived(object sender,
SerialErrorReceivedEventArgs e)
        {
            Console.WriteLine("Error");
        }
    }
}