Feaures in 2.0:
Special folders to make integration easier.
navigation controls,
login controls,
new conrols,
Master page,
Website without IIS,
Pesonalization,

no

1.Masterpage
2.DataGridview
3.Member ship control
4.ASP.NET Administrator to manage web configfile

Themes
MasterPages
Membership and Role Management
Login Controls
Navigation Controls
GridView

ASP.NET is a programming framework built on the common 
language runtime that can be used on a server to build 
powerful Web applications. The first version of ASP.NET 
offered several important advantages over previous Web 
development models. ASP.NET 2.0 improves upon that 
foundation by adding support for several new and exciting 
features in the areas of developer productivity, 
administration and management, extensibility, and 
performance: 

Developer Productivity
ASP.NET 2.0 encapsulates common Web tasks into application 
services and controls that can be easily reused across web 
sites. With these basic building blocks, many scenarios can 
now be implemented with far less custom code than was 
required in previous versions. With ASP.NET 2.0 it is 
possible to significantly reduce the amount of code and 
concepts necessary to build common scenarios on the web. 
New Server Controls. ASP.NET 2.0 introduces many new server 
controls that enable powerful declarative support for data 
access, login security, wizard navigation, menus, 
treeviews, portals, and more. Many of these controls take 
advantage of core application services in ASP.NET for 
scenarios like data access, membership and roles, and 
personalization. Some of the new families of controls in 
ASP.NET 2.0 are described below. 


Data Controls. Data access in ASP.NET 2.0 can be 
accomplished completely declaratively (no code) using the 
new data-bound and data source controls. There are new data 
source controls to represent different data backends such 
as SQL database, business objects, and XML, and there are 
new data-bound controls for rendering common UI for data, 
such as gridview, detailsview, and formview..


Navigation Controls. The navigation controls provide common 
UI for navigating between pages in your site, such as 
treeview, menu, and sitemappath. These controls use the 
site navigation service in ASP.NET 2.0 to retrieve the 
custom structure you have defined for your site.


Login Controls. The new login controls provide the building 
blocks to add authentication and authorization-based UI to 
your site, such as login forms, create user forms, password 
retrieval, and custom UI for logged in users or roles. 
These controls use the built-in membership and role 
services in ASP.NET 2.0 to interact with the user and role 
information defined for your site. 


Web Part Controls. Web parts are an exciting new family of 
controls that enable you to add rich, personalized content 
and layout to your site, as well as the ability to edit 
that content and layout directly from your application 
pages. These controls rely on the personalization services 
in ASP.NET 2.0 to provide a unique experience for each user 
in your application. 


Master Pages. This feature provides the ability to define 
common structure and interface elements for your site, such 
as a page header, footer, or navigation bar, in a common 
location called a "master page", to be shared by many pages 
in your site. In one simple place you can control the look, 
feel, and much of functionality for an entire Web site. 
This improves the maintainability of your site and avoids 
unnecessary duplication of code for shared site structure 
or behavior.


Themes and Skins. The themes and skins features in ASP.NET 
2.0 allow for easy customization of your site's look-and-
feel. You can define style information in a common location 
called a "theme", and apply that style information globally 
to pages or controls in your site. Like Master Pages, this 
improves the maintainability of your site and avoid 
unnecessary duplication of code for shared styles.


Personalization. Using the new personalization services in 
ASP.NET 2.0 you can easily create customized experiences 
within Web applications. The Profile object enables 
developers to easily build strongly-typed, sticky data 
stores for user accounts and build highly customized, 
relationship based experiences. At the same time, a 
developer can leverage Web Parts and the personalization 
service to enable Web site visitors to completely control 
the layout and behavior of the site, with the knowledge 
that the site is completely customized for them. 
Personalizaton scenarios are now easier to build than ever 
before and require significantly less code and effort to 
implement.


Localization. Enabling globalization and localization in 
Web sites today is difficult, requiring large amounts of 
custom code and resources. ASP.NET 2.0 and Visual Studio 
2005 provide tools and infrastructure to easily build 
Localizable sites including the ability to auto-detect 
incoming locale's and display the appropriate locale based 
UI. Visual Studio 2005 includes built-in tools to 
dynamically generate resource files and localization 
references. Together, building localized applications 
becomes a simple and integrated part of the development 
experience.


Administration and Management
ASP.NET 2.0 is designed with administration and 
manageability in mind. We recognize that while simplifying 
the development experience is important, deployment and 
maintenance in a production environment is also a key 
component of an application's lifetime. ASP.NET 2.0 
introduces several new features that further enhance the 
deployment, management, and operations of ASP.NET servers. 
Configuration API. ASP.NET 2.0 contains new configuration 
management APIs, enabling users to programmatically build 
programs or scripts that create, read, and update 
Web.config and machine.config configuration files. 


ASP.NET MMC Admin Tool. ASP.NET 2.0 provides a new 
comprehensive admin tool that plugs into the existing IIS 
Administration MMC, enabling an administrator to 
graphically read or change common settings within our XML 
configuration files.


Pre-compilation Tool. ASP.NET 2.0 delivers a new 
application deployment utility that enables both developers 
and administrators to precompile a dynamic ASP.NET 
application prior to deployment. This precompilation 
automatically identifies any compilation issues anywhere 
within the site, as well as enables ASP.NET applications to 
be deployed without any source being stored on the server 
(one can optionally remove the content of .aspx files as 
part of the compile phase), further protecting your 
intellectual property. 


Health Monitoring and Tracing. ASP.NET 2.0 also provides 
new health-monitoring support to enable administrators to 
be automatically notified when an application on a server 
starts to experience problems. New tracing features will 
enable administrators to capture run-time and request data 
from a production server to better diagnose issues. ASP.NET 
2.0 is delivering features that will enable developers and 
administrators to simplify the day-to-day management and 
maintenance of their Web applications. 
Flexible Extensibility
ASP.NET 2.0 is a well-factored and open system, where any 
component can be easily replaced with a custom 
implementation. Whether it is server controls, page 
handlers, compilation, or core application services, you'll 
find that all are easily customizable and replaceable to 
tailor to your needs. Developers can plug in custom code 
anywhere in the page lifecycle to further customize ASP.NET 
2.0 to their needs. 
Provider-driven Application Services. ASP.NET 2.0 now 
includes built-in support for membership (user 
name/password credential storage) and role management 
services out of the box. The new personalization service 
enables quick storage/retrieval of user settings and 
preferences, facilitating rich customization with minimal 
code. The new site navigation system enables developers to 
quickly build link structures consistently across a site. 
As all of these services are provider-driven, they can be 
easily swapped out and replaced with your own custom 
implementation. With this extensibility option, you have 
complete control over the data store and schema that drives 
these rich application services.


Server Control Extensibility. ASP.NET 2.0 includes improved 
support for control extensibility, such as more base 
classes that encapsulate common behaviors, improved 
designer support, more APIs for interacting with client-
side script, metadata-driven support for new features like 
themes and accessibility verification, better state 
management, and more. 


Data Source Controls. Data access in ASP.NET 2.0 is now 
performed declaratively using data source controls on a 
page. In this model, support for new data backend storage 
providers can be easily added by implementing custom data 
source controls. Additionally, the SqlDataSource control 
that ships in the box has built-in support for any ADO.NET 
managed provider that implements the new provider factory 
model in ADO.NET.


Compilation Build Providers. Dynamic compilation in ASP.NET 
2.0 is now handled by extensible compilation build 
providers, which associate a particular file extension with 
a handler that knows how to compile that extension 
dynamically at runtime. For example, .resx files can be 
dynamically compiled to resources, .wsdl files to web 
service proxies, and .xsd files to typed DataSet objects. 
In addition to the built-in support, it is easy to add 
support for additional extensions by implementing a custom 
build provider and registering it in Web.config.


Expression Builders. ASP.NET 2.0 introduces a declarative 
new syntax for referencing code to substitute values into 
the page, called Expression Builders. ASP.NET 2.0 includes 
expression builders for referencing string resources for 
localization, connection strings, application settings, and 
profile values. You can also write your own expression 
builders to create your own custom syntax to substitute 
values in a page rendering. 
Performance and Scalability
ASP.NET is built to perform, using a compiled execution 
model for handling page requests and running on the world's 
fastest web server, Internet Information Services. ASP.NET 
2.0 also introduces key performance benefits over previous 
versions. 
64-Bit Support. ASP.NET 2.0 is now 64-bit enabled, meaning 
it can take advantage of the full memory address space of 
new 64-bit processors and servers. Developers can simply 
copy existing 32-bit ASP.NET applications onto a 64-bit 
ASP.NET 2.0 server and have them automatically be JIT 
compiled and executed as native 64-bit applications (no 
source code changes or manual re-compile are required). 


Caching Improvements. ASP.NET 2.0 also now includes 
automatic database server cache invalidation. This powerful 
and easy-to-use feature allows developers to aggressively 
output cache database-driven page and partial page content 
within a site and have ASP.NET automatically invalidate 
these cache entries and refresh the content whenever the 
back-end database changes. Developers can now safely cache 
time-critical content for long periods without worrying 
about serving visitors stale data. 
The remainder of the QuickStart presents practical examples 
of these and other features in ASP.NET.

Master Pages
This new feature provides the ability to define common 
structure and interface elements for your site, such as a 
page header, footer, or navigation bar, in a common 
location called a "master page", to be shared by many 
different pages within your site.  


Navigation Control
Provide a common UI for navigating between pages in your 
site, such as tree views, menus, and breadcrumbs.  


Themes and Skins
This allows for easy customization of a site's look-and-
feel. You can define style information in a common location 
called a "theme" and apply that style information globally 
to pages or controls in a site.  


New Server Control
ASP.NET 2.0 includes 45 new server controls that enable 
powerful declarative support for data access, login 
security, wizard navigation, image generation, menus, tree 
views, portals and more. Many of the new controls take 
advantage of core application services in ASP.NET for 
scenarios like data access, membership and roles, and 
personalization.  


Data Control
Data access can be accomplished completely declaratively 
(without code) using the new data-bound and data source 
controls. There are new data source controls to represent 
different data backends such as SQL, business objects, and 
XML, and there are new data-bound controls for rendering 
common UI for data, such as grids, details, and data-bound 
forms 

grouping concept of validation is also in 2.0
we can provide coockiless state 
we made modification in web.config file with allow 
overriding
there is seperate conection string tag in web.config

Thank you very much fort these answers.It helps mostly for 
new programmers

main difference asp.net 2.0 and asp.net 1.0

Main difference is extended controls, advanced features like
master pages. .net reduces 70% code than .net1.0

Partial Classes,
Generics,
navigation controls,
login controls,
new conrols,
Master page,
Website without IIS,
Pesonalization....etc.

We implement ajax easly. Using Ajax Tool kite. We download 
tool and add to tool box we write code using <script 
manager />

asp.net 1.0 and 2.0 main difference  for controls and view
changing