The ASP.NET application life cycle refers to the sequence of events that occur when an ASP.NET application is processed. It includes the initialization of an application, request handling, and response rendering. The ASP.NET application life cycle can be divided into multiple stages according to events and handlers.
The first stage is application initialization and is where the Application_start event is called. The second is the request handling stage and is where requests are processed. The last stage is the request rendering stage and is where the response is sent back to the user.