Question

Trying to implement data to be saved on the session timeout.how can i capture the session timeout event.

Answer 1

You have to implement Session_End event in Global.asax, The Session_End event is raised at the end of a request when the Abandon method has been called or when the session has expired. A session expires when the number of minutes specified by the Timeout property passes without a request being made for the session. MSDN reference

publicvoid Session_OnEnd()
{
    //Saving of data goes here.    
}