HttpResponse Headers

[Alex Klimantov]

Does anyone knows how to get access to HTTP Headers (custom headers, added earlier with Response.AppendHeader)
e.g
somewhere in the code
Response.AppendHeader("Content-Disposition", "attachment")

now in Application_EndRequest I need to monitor if this cutom header is present in response object
How do I do that? It seems that I can add headers and remove all of them but cannot work with individual items..

Any help is greatly appreciated.