What’s new in ASP.NET 4.0 and Visual Studio Beta 2?

List is quite big!!!

Core Services

   Web.config File Minification

   Extensible Output Caching

   Auto-Start Web Applications

   Permanently Redirecting a Page

   The Incredible Shrinking Session State

   Expanding the Range of Allowable URLs

   Extensible Request Validation

   Object Caching and Object Caching Extensibility

   Extensible HTML, URL, and HTTP Header Encoding

   Performance Monitoring for Individual Applications in a Single Worker Process


New Features in ASP.NET AJAX 4

   Client Template Rendering

   Instantiating Behaviors and Controls Declaratively

   Live Data Binding

   Using the Observer Pattern with JavaScript Objects and Arrays

   The DataView Control

   The AdoNetServiceProxy Class

   The DataContext and AdoNetDataContext Classes

   Refactoring the Microsoft AJAX Framework Libraries

   The DOM Ready Event

   Using JSONP to Retrieve Cross-Domain Data.

Web Forms

   Setting Meta Tags with the Page.MetaKeywords and Page.MetaDescription Properties

   Enabling View State for Individual Controls

   Changes to Browser Capabilities

   Routing in ASP.NET 4

   Setting Client IDs

   Persisting Row Selection in Data Controls

   ASP.NET Chart Control

   Filtering Data with the QueryExtender Control

   Html Encoded Code Expressions

   Project Template Changes

   CSS Improvements

   Hiding div Elements Around Hidden Fields.

   Rendering an Outer Table for Templated Controls

   ListView Control Enhancements

   CheckBoxList and RadioButtonList Control Enhancements

   Menu Control Improvements

   Wizard and CreateUserWizard Controls


Dynamic Data

   Enabling Dynamic Data for Existing Projects

   Declarative DynamicDataManager Control Syntax

   Entity Templates

   New Field Templates for URLs and E-mail Addresses

   Creating Links with the DynamicHyperLink Control

   Support for Inheritance in the Data Model

   Support for Many-to-Many Relationships (Entity Framework Only)

   New Attributes to Control Display and Support Enumerations

   Enhanced Support for Filters

Visual Studio 2010 Web Designer Improvements

   Improved CSS Compatibility

   HTML and JScript Snippets

   JScript IntelliSense Enhancements.

Web Application Deployment with Visual Studio 2010

   Web Packaging

   Web.config Transformation

   Database Deployment

   One-Click Publish for Web Applications


Find at http://www.asp.net/learn/whitepapers/aspnet40/, more whitepapers on ASP.Net can be found at http://www.asp.net/learn/whitepapers/