2.0 has some extendable features when compared to 1.1
1).net 2.0 supports web Request, web Response and web client classes
2).net 2.0 added the features of generic classes
3).net 2.0 added the feature of MultipleActiveResultSet,UserDefinedDataTypes,xmlDataTypes
4).net 2.0 UTF8Encoding is more faster than 1.1
5)When the file attachment u s
To read more Detail click the following link
http://msdn.microsoft.com/en-us/library/t357fb32.aspx
Difference between 2.0 and 3.0 is
WCF,WPF,WWF,WindowsCardSpace
3.0 and 3.5 is similar, with the additional features of enhanced WCF Control,ASp.net with Ajax , LinQ
