This is a direct quote from the Wikipedia page on Global.asax. Just thought it would be nice to a quick list to refer to.
- Application_Init
- Fires when the application initializes for the first time.
- Application_Start
- Fires the first time an application starts.
- Session_Start
- Fires the first time when a user’s session is started.
- Application_BeginRequest
- Fires each time a new request comes in.
- Application_EndRequest
- Fires when the application terminates.
- Application_AuthenticateRequest
- Indicates that a request is ready to be authenticated.
- Application_Error
- Fires when an unhandled error occurs within the application.
- Session_End
- Fires whenever a single user Session ends or times out.
- Application_End
- Fires when the application ends or times out (Typically used for application cleanup logic).