Reading a .exe file and copying to another location........

Thanx for support...... I have got...

The mistake is ... I havent used the seek pointer.....

Hi -

I want to develop an application, which reads from source file,and paste it to the destination file...

I want to read only 1024 Bytes at a time, and paste it to another location...

The code is :
------

private const string FILE_NAME = "Sample.txt";
public static void Main(String[] args)
{
FileStream fs = File.Create("Sample1.txt");
FileStream sr = File.Open (FILE_NAME,FileMode.Open,FileAccess.Read,FileShare.Read);

byte[] b = new byte[1024];
int variable = 0, tempVariable = 0;

while ( (tempVariable = sr.Read(b,0,b.Length)) > 0)
{
//fs.Write(b,variable,tempVariable);
fs.Write(b,0,variable);

variable += tempVariable;
}
Console.WriteLine ("The end of the stream has been reached.");
sr.Close();
fs.Close();
}

The code is giving me the error:

Offset and length are out of bounds.

If I read the full bytes and write full bytes , it is working... but I want to read 1024 bytes at a time......

Thanx in advance,
dwurity