Session variable returning null ...after couple of postbacks..though user session is valid

I have logged in to the application (In development Environment) with my userid and pswd... I am using Session variables in the application..in order to access some values acros开发者_运维技巧s different pages. Though my session didnt time out, my session variables are becoming null after a while...Can some one please help me with this..

Thanks,

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I would add handlers in your Global.asax. Log anytime any of the Application_Start, Application_End, Session_Start, and Session_End are called.

The Session_End method should be called any time a session ends, and may give you a clue as to why your session variables are disappearing. This only works when the session is persisted InProc mode though.

Note that if your application recycles in IIS, then all of the session data will be lost as well, so that is why I would recommend logging at all points in the Application and Session startup / teardown.