There is lot of new feature include in ASP.Net 2.0 
1. Role and membership Management .  
   It is create tricky mathod for create an application 
with areas that are accesss by  only select user .
 Example 
 if(Membership.validateUser (userid,password))
{
}
2.Personalization :-  User can offer to setting there 
persnol setting .
3.Site Navigation :- We can create Site Map for application 
in XML file that  can easly inherite by specific co control
4. New Copilation System :-
   Page by Page Compilation with recomplilation whole 
appliction.
5.Master Page: - This is proide easy way to same loke and 
fill whole site . 
6.thems : - 
  providing way to change Thims of application. 
7.New Object For Accessing Data. Such as  <SqlDataSource>
8. New Server Control : -Such As GridView,FormView etc. 


  Thank you,
  Rahul Tripathi.

  rahultripathi@myway.com