Question

How many ways we can extend the session expired time in ASP.net ?

Answer 1

You can try with Session_End in Global.asax, event is raised in the end of session

Link : http://msdn.microsoft.com/en-US/library/ee255109(v=bts.10).aspx

public class Global : System.Web.HttpApplication
{
        void Session_End(object sender, EventArgs e)
        {
            // Code that runs when a session ends. 
            // Note: The Session_End event is raised only when the sessionstate mode
            // is set to InProc in the Web.config file. If session mode is set to StateServer 
            // or SQLServer, the event is not raised.

        }

}