Why is a second browser window open?
How is the data being stored?
If I build an application that allows me to edit data and I open up two browsers to the same data, then I would get the same results. This is a issue of application design. Are you asking how to lock data updates to eliminate concurrency issues?
And does any of this relate to the topic subject "login in multiple websites using asp.net 2.0"?
-Peter
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