using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.IO.Compression;
using System.Net;
using System.Net.Mail;
using System.Runtime.InteropServices;
using System.Text;
public class MainClass
{
public static void Main()
{
using (Stream s = new FileStream("c:\\test.txt", FileMode.Open))
{
byte[] buffer = new byte[4096];
int bytesRead;
do
{
IAsyncResult ar = s.BeginRead(buffer, 0, buffer.Length, null, null);
bytesRead = s.EndRead(ar);
}
while (bytesRead == buffer.Length);
}
}
}