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how can i disable a Login when the user is already online somewhere?

Posted By:      Posted Date: September 23, 2010    Points: 0   Category :ASP.Net
i need a code to disable someone who automatic Logout the second login of the same user at the same time. EXPLANATION: when a user is online on a particular system and he tries to Login on another system without Logging out on the previous system, so i need a code to Log him/she out since he/she Login is still online on another system

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