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Can anybody tell me when Application_End is triggered in a lifecycle of an application? When all sessions are ended, will Application_End be triggered automatically? + Are there any other reasons why Application_End could be triggered?
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asax is not required by ASP.NET for a website to run. It is, however, very useful for application-level functionality (like unhandled exception logging).
Global. asax is an optional file which is used to handling higher level application events such as Application_Start, Application_End, Session_Start, Session_End etc. It is also popularly known as ASP.NET Application File. This file resides in the root directory of an ASP.
Application_EndRequest() : Occurs with each request the application receives, just after the page code is executed. Session_Start() : Occurs whenever a new user request is received and a session is started. Session_End() : Occurs when a session times out or is programmatically ended.
The application_end event primarily fires when the IIS pool is recycled or the application itself is unloaded. One other thing to note, that a change to a dependent file (say web.config) will cause the application to reload itself, which will in cause the application_end event to fire while it is closing itself off.
To note, the only instance I found of the application end event firing when the last user session times out is in some old documentation dated 2001. I'm not sure if that criteria still applies.
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