What are the event handlers that we can have in Global.asax file?

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Application Events: Application_Start , Application_End, Application_AcquireRequestState, Application_AuthenticateRequest, Application_AuthorizeRequest, Application_BeginRequest, Application_Disposed, Application_EndRequest, Application_Error, Application_PostRequestHandlerExecute, Application_PreRequestHandlerExecute,Application_PreSendRequestContent, Application_PreSendRequestHeaders, Application_ReleaseRequestState, Application_ResolveRequestCache, Application_UpdateRequestCache

Session Events: Session_Start,Session_End

In ASP.NET, the Global.asax file is used to handle application-level events and is often referred to as the “Global Application Class.” It allows you to respond to application-level events such as application start, end, session start, end, error handling, etc. Here are some commonly used event handlers in the Global.asax file:

  1. Application_Start: This event is triggered when the application starts for the first time or when the application domain is restarted. It’s typically used for application-wide initialization tasks.
  2. Application_End: This event is triggered when the application shuts down or the application domain is unloaded. It allows you to perform cleanup tasks such as releasing resources.
  3. Application_BeginRequest: This event is raised at the beginning of each request. It’s useful for implementing custom request processing logic, such as URL rewriting or custom authentication.
  4. Application_EndRequest: This event is raised at the end of each request. It’s often used for post-request cleanup tasks.
  5. Application_Error: This event is triggered when an unhandled exception occurs anywhere in the application. It’s used for centralized error handling and logging.
  6. Session_Start: This event is raised when a new session is started for a user. It’s commonly used for initializing session-specific data.
  7. Session_End: This event is raised when a session ends, either due to inactivity or explicitly calling Session.Abandon(). It allows you to perform cleanup tasks related to the session.

When asked about event handlers in the Global.asax file, you could provide this list and elaborate on each event handler’s purpose and typical usage scenarios.