unzipping file in host ?

Hi world !
I have this php code for unzipping file in server host.

<?php  
$zip = new ZipArchive;  
$res = $zip->open('6.zip'); 
if ($res === TRUE) {   
$path = pathinfo(realpath('6.zip'), PATHINFO_DIRNAME); 
$zip->extractTo($path); 
$zip->close();  
echo 'ok';  
unlink('UnzipViaPhp.php');  
} else { 
echo 'failed'; 
}  
?> 

So now i wanna ASP.NET code for unzipping the file on server host .(Something like the php one).