Differences between .NET 3.0 & 3.5?

Question

What are the major differences between the .NET 3.0 & 3.5 frameworks?

Answer 1

ASP.NET AJAX was inbuilt for 3.5

.Net 3.0

.net 2.0 features + WF+WPF+WCF+ Cardspace

.Net 3.5

.Net 3.0 features + LINQ, ASP.NET AJAX, new controls, richer WCF support (incl REST, AtomPub), and a few other features

For more details refer to: .Net Frameworks that shows the difference and added features from .net frameworks 1.0 and on

Answer 2

Big one is LINQ