.net versions

you can also check below urls

http://www.c-sharpcorner.com/uploadfile/sujit9923/net-framework-features-from-net-2-0-to-4-5/

http://blogs.msdn.com/b/johnwpowell/archive/2008/03/16/c-and-net-framework-features-by-version-quick-reference.aspx

heyy!

.Net 2.0
- CLR Features
- Delegates
 
.Net 3.0
- WCF
- WPF
 
.Net 3.5 
- Enhanced Feature of .Net 3.0
- LINQ
 
.Net 4.0 
- Parallelism
- Entity Framework

for more info please visit
http://dotnetguts.blogspot.in/2010/06/difference-between-net-40-and-net-35-20.html

:)

        Hi
                U can refer to these link.may be it will help u.

http://www.dotnet-tricks.com/Tutorial/netframework/HJXU171213-A-brief-version-history-of-.NET-Framework.html

www.c-sharpcorner.com/Blogs/11108/