Asynchronous file IO using anonymous methods

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.IO;
using System.Diagnostics;

namespace asyncFileIO
{
    class Program
    {
        static void Main(string[] args)
        {
            FileStream fs = new FileStream("C:\\sample.txt",FileMode.Open);
            Byte[] data = new byte[200];
            long timeNow = Stopwatch.GetTimestamp();
            fs.BeginRead(data,0,data.Length,delegate(IAsyncResult ar)
            {
                // Section 1
                // =========
                int bytesRead = fs.EndRead(ar);
                fs.Close();
                Console.WriteLine(ASCIIEncoding.ASCII.GetString(data));
                Console.WriteLine("Time stamp at the end of section 1 : {0}", Stopwatch.GetTimestamp()-timeNow);
            },null);
            
            // Section 2
            // =========
            Console.WriteLine("Time stamp at the end of end section 2 : {0}", Stopwatch.GetTimestamp() - timeNow);
            Console.ReadLine();
        }
    }
}