Today we live in the age of a collaborative, integrated and unified communication environment with the presence of numerous intelligent devices. In this world of collaboration .NET allows the developers the flexibility of interacting through various interfaces like Desktops, Phones, TVs, Browsers, Internet etc. .NET is a platform that allows a developer to make intelligent applications with interoperability across platforms, that too in a limited time frame.

General Page Life-cycle Stages

1. Page request The page request occurs before the page life cycle begins. When the page is requested by a user, ASP.NET determines whether the page needs to be parsed and compiled or whether a cached version of the page can be sent in response without running the page.
2. Start In the start step, page properties such as Request and Response are set. At this stage, the page also determines whether the request is a postback or a new request and sets the IsPostBack property. Additionally, during the start step, the page's UICulture property is set.
3. Page During page initialization, controls on the page are available and each control's UniqueID initialization property is set. Any themes are also applied to the page. If the current request is a postback, the postback data has not yet been loaded and control property values have not been restored to the values from view state.
4. Load During load, if the current request is a postback, control properties are loaded with informationrecovered from view state and control state.
5. Validation During validation, the Validate method of all validator controls is called, which sets the IsValid property of individual validator controls and of the page.
6. Postback event If the request is a postback, any event handlers are called handling
7. Rendering Before rendering, view state is saved for the page and all controls. During the rendering phase, the page calls the Render method for each control, providing a text writer that writes its output to the OutputStream of the page's Response property.
8. Unload Unload is called after the page has been fully rendered, sent to the client, and is ready to be discarded. At this point, page properties such as Response and Request are unloaded and any cleanup is performed.