asp.net - Session_End does not fire?

Question

I want to sign out a user when his session times out. So used following code in Global.asax:

protected void Session_End(object sender, EventArgs e)
{
    FormsAuthentication.SignOut();
}

But seems session_end never fires. Any idea how can fix it? I'm using ASP.NET with default settings.

Answer 1

You may set some Session data in Session_Start. Without this, Session_End will not be fired. see this

Also another very important thing to note here is that if you do not save anything in the session the Session_End event will not fire. There must be something saved in the session atleast once for the Session_End event to fire. This also means that if you save something in the session in the first request and abandon the session in the same request the Sesison_End event will not fire, as there was nothing saved in the session ever.