With growing usage of Tabbed browsing this can be requirement in some cases that separate sessions should be used for multiple Tabs.
ASP .Net 2.0 (and MAY BE later versions) provide a smart solution for this purpose. The solution is to add following line in your web.config file
<sessionState mode="InProc" cookieless="UseUri"></sessionState>
above line should be added in system.web section of web.config. This will add the session value in URL