The .NET Framework 4 works side by side with the Framework version 3.5 SP1. Applications that are based on earlier versions of the Framework will continue to run on that version. Just a subset of functionality is shared by all versions of the Framework.
Innovations in the Visual Basic and C# languages, for example statement lambdas, implicit line continuations, dynamic dispatch, and named/optional parameters.
- The ADO.NET Entity Framework, which simplifies how developers program against relational
- Enhancements to ASP.NET:
New JavaScript UI Templates and databinding capabilities for
New ASP.NET chart control.
Download : Microsoft .NET Framework 4 Beta 1 (ia64)
Download : Microsoft .NET Framework 4 Beta 1 (x64)
Microsoft.net framework 4 beta 1