Is it possible to get the Winodws.Form.WebBrowser (VS 8 Beta2 C#) to not pass the Cookies for a site to the host when calling Navigate?

Cookies can change the resulting page and I would like to get a page that is not influenced by the cookies.

Usually with this control the Document can be used to get the cookies, but these are the response cookies. The OnNavigating seem like the place to do this but I can't see how?