Pl explain me following c#.net program..plzz its very urgent..?

using System;


using System.Collections.Generic;


using System.Text;


using System.IO;


using System.Security.Cryptography;





namespace ConsoleApplication1


{


class Program


{


static void Main(string[] args)


{





MD5 mMD5 = new MD5CryptoServiceProvider();


byte[] bHash;


byte[] bBlock = new Byte[512];


StreamWriter[] swWriters512 = CreateWriters( "table.512.fragments." );


/*Repeated for every block size*/


StreamWriter[] swWriters1 = CreateWriters( "table.1. fragments." );


int iLineCounter = 0;


Stream sFileList = File.OpenRead( args[0] );


StreamReader srFileList = new StreamReader( sFileList );


string sFileDataName = srFileList.ReadLine();





while (sFileDataName != null)


{


string sFileDataHash = sFileDataName.Substring( 6, 32 );


if (iLineCounter++ % 10 == 0 )


Console.WriteLine( "Processing {0}.", sFileDataHash);


Stream sFileData = File.OpenRead( sFileDataName );


BufferedStream bsFileData = new BufferedStream( sFileData );


int iCounter = 0;


while ( bsFileData.Read( bBlock, 0, 512) == 512 )


{


bHash = mMD5.ComputeHash( bBlock );


swWriters512[ bHash[0] ].WriteLine( "{0} {1} {2,5}", HashString( bHash ), sFileDataHash, iCounter );


/*Repeated for every block size*/


bHash = mMD5.ComputeHash( bBlock, 499, 1 );


swWriters1 [ bHash[0] ].WriteLine( "{0} {1} {2,5}", HashString( bHash ), sFileDataHash, iCounter );


iCounter++;


}


bsFileData.Close();


sFileDataName = srFileList.ReadLine();


}


srFileList.Close();


CloseWriters( swWriters1 );


/*Repeated for every block size*/


CloseWriters( swWriters512 );








}





static StreamWriter[] CreateWriters( string sFilename )


{


StreamWriter[] swWriters = new StreamWriter[256];


for( int iCounter=0; iCounter %26lt;= 255 ; iCounter++ )


{


swWriters[ iCounter ] = new StreamWriter( sFilename + iCounter.ToString( "x2" ) );


}


return swWriters;


}





static void CloseWriters( StreamWriter[] swWriters )


{


for( int iCounter=0; iCounter %26lt;= 255 ; iCounter++ )


{


swWriters[iCounter].Close();


}


}


static string HashString( byte[] hash )


{


return hash[0].ToString("x2") + hash[1].ToString("x2") + hash[2].ToString("x2") + hash[3].ToString("x2") +


hash[4].ToString("x2") +


hash[5].ToString("x2") +


hash[6].ToString("x2") +


hash[7].ToString("x2") +


hash[8].ToString("x2") +


hash[9].ToString("x2") +


hash[10].ToString("x2") +


hash[11].ToString("x2") +


hash[12].ToString("x2") +


hash[13].ToString("x2") +


hash[14].ToString("x2") +


hash[15].ToString("x2");


}


}








}

Pl explain me following c#.net program..plzz its very urgent..?
Computer Tutorials, Interview Question And Answer


http://freshbloger.com/
Reply:It lookes like its doing some encrytion.


Do some researce on the MD5CryptoServiceProvider Class
Reply:It's decrypting a file using MD5 encryption.