I\'m using webbrowser control to login any site. And then i want to download some sub page html using WebRequest (or WebClient). This links must requires authentication.
A late answer for future references. WebBrowser uses UrlMon library which manages the session per-process, so UrlMon APIs like URLOpenStream or URLDownloadToFile can be used to download any resource on the same session (the APIs can be called from C# via P/invoke). A similar question answered here.