Basic difference between .net 3.5 and 4.0

In this article I will explain difference between .net 3.5 and 4.0.


Difference between Framework 3.5 and Framework 4.0:

1. EnableViewState - [true or false] in Framework 3.5
EnableViewState -[Enabled/Disabled/Inherits] in Framework 4.0.


2.Keyword and Description is added in Framework 4.0 while it is not available in Framework 3.5 in the Page Directives.

3.use Multi-Targeting Feature:
For using multi-targeting feature , users will have to add “targetframework” attribute in the compilation element of the web.config file. 


Dear all i knew only this difference if some one know more pls welcome to add here