Response.Headers and IIS6

So I'm trying to iterate over Response.Headers for a custom caching job, but I'm getting the following error when I touch the thing:

This operation requires IIS integrated pipeline mode

It this possible to do in IIS6? Is there a workaround?

var allHeaders = HttpContext.Current.Response.Headers;  
// error thrown as soon as it's开发者_如何学Go accessed

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AFAIK you cannot access the HTTP response headers unless you are running in integrated mode because they are sent by the server at a later stage of the execution of the request when running in standard mode.