This provides a brief comparison between ASP.Net 2.0 and ASP.Net 3.5

1. Difference between ASP.Net 2.0 and ASP.Net 3.5
SN Feature ASP.Net 2.0 ASP.Net 3.5
o
1 New ASP.Net 2.0 includes the ASP.Net 3.5 includes the
Features following as new features, following as new features,
a) Master Pages a) ListView Control
b) Profiles b) DataPager Control
c) GridView Control c) Nested Master Pages
d) LinqDataSource Control
2 Multi- ASP.Net 2.0 does not ASP.Net 3.5 supports multi-
targeting support Multi-Targeting targeting. It means that we
environment. choose from a drop-down list
whether to have Visual Studio
2008 build applications against
the ASP.NET 2.0, 3.0, or 3.5
frameworks.
3 AJAX There is no in-built support In ASP.Net 3.5, AJAX is
Support for AJAX in ASP.Net 2.0. integrated into the .NET
Instead, it has to be Framework, thereby making the
downloaded and installed. process of building intuitive cool
user interfaces easier.
4 Siverlight It does not support It supports Siverlight.
Support Siverlight.
5 Javascript It does not provide It provides Javascript debugging.
Debugging Javascript debugging.
6 LINQ It does not support LINQ. It Supports Language Integrated
Support Query (LINQ).