Session lost and application end, after file download

Posted by Amr ElGarhy on Stack Overflow See other posts from Stack Overflow or by Amr ElGarhy
Published on 2010-03-18T00:10:15Z Indexed on 2010/03/18 0:11 UTC
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I have this code in the end of link button click:

Response.ContentType = "application/zip";
Response.AppendHeader("content-disposition", "attachment;");

to download a zip file from an aspx page.
In the previous page i set a session variable, after going to this download page and download the file, then press back i find the session=null "this happen after downloading more than 1 time", and the application_end in global.ascx called.

Do you know why this may happen??

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