SystemWebMvc

System.Web.Mvc is a namespace within the .NET Framework that provides classes for developing Model-View-Controller (MVC) web applications. It is a foundational component of ASP.NET MVC, a framework that separates application concerns into three distinct parts: the model, the view, and the controller. The model represents the application's data and business logic. The view is responsible for presenting the model's data to the user, typically as HTML. The controller handles user input, interacts with the model, and selects the appropriate view to render.

Key classes within System.Web.Mvc include Controller, which serves as the base class for controllers that handle incoming requests, and ViewResult, which represents the result of an action method that renders a view. The namespace also contains classes for data binding, validation, and routing, enabling developers to build robust and maintainable web applications. ASP.NET MVC, utilizing System.Web.Mvc, allows for greater testability and cleaner code organization compared to traditional ASP.NET Web Forms. While ASP.NET Core now offers a cross-platform, open-source successor, System.Web.Mvc remains relevant for existing ASP.NET MVC applications built on the .NET Framework.