Major events in Global.Asax file?

The Global.asax file in ASP.NET provides a way to handle application-level events and perform global application-level tasks. It contains several major events that are triggered during the lifecycle of an ASP.NET application.


This event is fired when the application is started for the first time or when the application pool is recycled. It is typically used to perform application-level initialization tasks, such as registering routes, setting up global configuration settings, or initializing global variables.


This event is fired when the application is about to be shut down or when the application pool is recycled. It is used to perform cleanup tasks or release any resources held by the application.


This event is fired when a new user session is started. It is commonly used to perform session-specific initialization tasks, such as initializing session variables or setting session-level configuration.


This event is fired when a user session is about to be terminated or expires. It can be used to perform cleanup tasks related to the session, such as releasing session-specific resources or logging out the user.


This event is fired when an unhandled exception occurs anywhere in the application. It allows you to handle and log errors that are not caught by individual pages or components. You can use this event to customize error handling, redirect to an error page, or log exception details for debugging purposes.


This event is fired when the application receives a request and authentication has been performed. It allows you to perform custom authentication and authorization logic before processing the request.

BeginRequest and EndRequest

These events mark the beginning and end of each individual request processed by the application. They can be used to intercept and modify incoming requests or outgoing responses, such as implementing custom HTTP modules or filters.


These events provide hooks into the application lifecycle and allow you to customize the behavior and perform global tasks at different stages of the application's execution. By handling these events in the Global.asax file, you can control the application's behavior and perform application-level tasks efficiently.