 .NET  Framework Version 4.0
.NET  Framework Version 4.0
Microsoft Corporation - 48.11MB  (Freeware)
The .NET Framework is Microsoft's comprehensive and  consistent programming model for building applications that have visually  stunning user experiences, seamless and secure communication, and the ability to  model a range of business processes.
The Microsoft .NET Framework 4  redistributable package installs the .NET Framework runtime and associated files  that are required to run and develop applications to target the .NET Framework  4.
The .NET Framework 4 works side by side with older Framework versions.  Applications that are based on earlier versions of the Framework will continue  to run on the version targeted by default.
.NET Framework 4 includes the  following new features and improvements:
Improvements in CLR and  BCL
Improvements in ADO.NET
Enhancements to ASP.NET
Improvements in  Windows Presentation Foundation
Improvements to Windows Workflow Foundation  and Windows Communication Foundation