ASP.Net 的 Session_END 何时产生？

[mynull]

Sub Session_Start(S As Object, E As EventArgs)
Dim sIP As String
Application("onLineUser")=Request.UserHostAddress
End Sub
Sub Session_End(S As Object, E As EventArgs)
Dim sIP As String
Application("onLineUser")= "I will leave:" & Request.UserHostAddress
End Sub

我运行 Response.Write(Application("onLineUser"))显示结果，
用另一台机器来浏览网页，或关闭IE离开，结果始终见不到 I will leave: 字样，即使是30分钟后也一样，请问什么原因？

[karma]

You're never going to see that, since even if your session expired, but when you use Response.Write(), a new session will be generated, the value Application("onLineUser") is reset to UserHostAddress

Try to use Application("SessionExpired") in Session_End and Response.Write(Application("SessionExpired"))

[julyclyde]

我觉得不应该产生一个新的session。因为那时候客户早已离开这个站点了
应该是：出错