RFID application using C#. Reason for not able to read data

Question

I have managed to connect to the RFID USB reader using the code below... However, whenever my tag is placed near the reader. It does not run the function and produce an output of "Reading Data...". Anyone can provide me a functioning RFID coding? Below is my codes written.

        using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Net;
    using System.Net.Sockets;
    using System.IO.Ports;
    using System.Threading;
    using System.Windows.Forms;
    using Gtk;

    namespace Testing1
    {
        public class Testing1
        {
            public static SerialPort iSerialPort = new SerialPort();

            static int Main() 
            {
                string strException = string.Empty;
                string strComPort = "COM17";
                int nBaudrate=Convert.ToInt32(9600);

                int nRet = OpenCom(strComPort, nBaudrate, out strException);
                if (nRet != 0)
                {
                    string strLog = "Connect reader failed, due to: " + strException; 
                    Console.WriteLine(strLog);
                    //return;
                }
                else
                {
                    string strLog = "Reader connected " + strComPort + "@" + nBaudrate.ToString();
                    Console.WriteLine(strLog);
                }

                Console.WriteLine("Press any key to exit.");
                Console.ReadKey();

                iSerialPort.Close();
                return 0;
            }

            public static int OpenCom(string strPort, int nBaudrate, out string strException)
            {

                strException = string.Empty;

                if (iSerialPort.IsOpen)
                {
                    iSerialPort.Close();
                }

                try
                {
                    iSerialPort.PortName = strPort;
                    iSerialPort.BaudRate = nBaudrate;
                    iSerialPort.ReadTimeout = 3000;
                    iSerialPort.DataBits = 8;
                    //iSerialPort.Parity = Parity.None;
                    //iSerialPort.StopBits = StopBits.One;
                    //iSerialPort.Handshake = Handshake.None;
                    iSerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
                    iSerialPort.Open();
                }
                catch (System.Exception ex)
                {
                    strException = ex.Message;
                    return -1;
                }



                return 0;
            }

            private static void DataReceivedHandler(object sender,SerialDataReceivedEventArgs e)
            {
                SerialPort sp = (SerialPort)sender;
                string indata = sp.ReadExisting();
                Console.WriteLine("Data Received:");
                Console.Write(indata);
            }
        }
    }