The namespace provides classes and interfaces that enable you to create ASP.NET server controls and ASP.NET Web pages for the user interface of your ASP.NET Web applications.

This namespace includes the class, which provides a common set of functionality for all server controls, which includes HTML server controls, Web server controls, and user controls. It also includes the class. This class is generated automatically whenever a request is made for an .aspx file in an ASP.NET Web application. You can inherit from both of these classes.

The namespace also includes classes that provide the server controls with data-binding functionality, the ability to save the view state of a given control or page, and parsing functionality.