asp.net how to zip a file and start uploading it to user
<p>I have an existing ZIP file (with some files) where I want to add a few more files.</p>

<p>When user clicks a download button, this ZIP should be modified just a little and downloading to browser needs to start.  ( There can be several users at time of course, and each one need to receive a little bit different zip file.)</p>

<p>Is there this kind of feature/library in asp.net  to modify zip file</p>
