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I've recently been developing a website using asp.net webforms that uses in proc sessions and I noticed that session ids are shared amongst browser tabs. So I was wondering what you would do for the following situations: Problem: Multiple logins with different users in the one browser problem User opens browser tab 1, logins with "user1" - store in session User opens browser tab 2, logins with "user2" - store in session At this stage session information is now pointing to "user2" because of how session id is shared amongst browser tabs User tries an action on tab 1 and suddenly they have "user2" information How do you alert the user in tab 1 that the user has changed or how do force tab1 user to logout? My initial thought was to keep a list of active users with session id via database or application object, but the problem I face is that in tab 1 what am I going to compare the list against, when I do a request the HttpContext.Current.User would be updated with "user2" how do I know browser tab 1 was initially for "user1" Appreciate anyone letting me know of any alternatives or best practices for the above problem Regards DotnetShadow

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