The preview version of ASP.NET 3.5 Extensions is released. The Extensions are a new set of tools and controls that will be added onto existing release of ASP.NET with .NET 3.5. This will make possible for web developers to get the latest updates on ASP.NET without having to wait 1-2 years more for the next release of .NET Framework.
It also includes ADO.NET Entity Framework Beta 3, which you can also download as a separate file here (you do not need to download it if you have ASP.NET 3.5 Extensions Preview installed already).


What’s in the Extensions Release?

ASP.NET MVC
ASP.NET MVC provides model-view-controller (MVC) support to the existing ASP.NET 3.5 runtime, which enables developers to more easily take advantage of this design pattern. Benefits include the ability to achieve and maintain a clear separation of concerns, as well as facilitate test driven development (TDD).

The ASP.NET MVC Toolkit provides HTML rendering helpers and dynamic data support for MVC.

ASP.NET Dynamic Data
ASP.NET Dynamic Data helps developers build a fully customizable, data-driven app quickly. It provides a rich scaffolding framework that allows rapid data driven development without writing code, yet it is easily extendible using the traditional ASP.NET programming model.

ASP.NET AJAX
New additions to ASP.NET AJAX include support for managing browser history (Back button support).

ADO.NET Entity Framework
ADO.NET Entity Framework is a new modeling framework that enables developers to define a conceptual model of a database schema that closely aligns to a real world view of the information. Benefits include easier to understand and easier to maintain application code that is shielded from underlying database schema changes.

ADO.NET Data Services
ADO.NET Data Services provide new services that find, manipulate and deliver data over the web using simple URIs. Benefits include an easy and flexible way to access data over the web, while enabling the separation of presentation and data access code.

Silverlight Controls for ASP.NET
You can integrate the rich behavior of Microsoft Silverlight into your Web application by using two new ASP.NET server controls: a MediaPlayer server control that enables easy integration of media sources such as audio (WMA) and video (WMV) into your Web application, and a Silverlight server control that allows an ASP.NET page to reference both XAML objects and their event handlers.