in my application.there is signin and signout.
while sign in to the application there is a checking for whether the user is already signin.if it is already sign in there is another option for signout the seesion.ie there is a link comes click to signout your current session.after clicking that another message will come,you can now login. everything is working fine.
my problem is if i sign in to one system ,without signout if i sign in from other system with same userid .i want session out the session from first system.
means allows only one login at a time.how it is possible. some tutorial says that, set variables in global.asax file.
anybody know plz help me