hi ankit,

The following are the new features of .NET Framework 4.0:

1.         Improved Application Compatibility and Deployment Support
2.          Dynamic Language Runtime
3.         Managed Extensibility Framework
4.         Parallel Programming framework
5.         Improved Security Model
6.         Networking Improvements
7.         Improved Core ASP.NET Services
8.         Improvements in WPF 4
9.         Improved Entity Framework (EF)
10.         Integration between WCF and WF