What's New in ASP.NET 4.5 and Visual Studio 2012

This Post describes new features and enhancements that are being introduced in ASP.NET 4.5. It also describes improvements being made for web development in Visual Studio (Visual Web Developer).

• ASP.NET Core Runtime and Framework
  • Asynchronously Reading and Writing HTTP Requests and Responses
  • Improvements to HttpRequest handling
  • Asynchronously flushing a response
  • Support for await and Task-Based Asynchronous Modules and Handlers
  • Asynchronous HTTP modules
  • Asynchronous HTTP handlers
  • New ASP.NET Request Validation Features
  • Deferred ("lazy") request validation
  • Support for unvalidated requests
  • AntiXSS Library
  • Support for WebSockets Protocol
  • Bundling and Minification
  • Performance Improvements for Web Hosting
    • Key Performance Factors
    • Requirements for New Performance Features
    • Sharing Common Assemblies
    • Using multi-Core JIT compilation for faster startup
    • Tuning garbage collection to optimize for memory
    • Prefetching for web applications
• ASP.NET Web Forms
  • Strongly Typed Data Controls
  • Model Binding
    • Selecting data
    • Value providers
    • Filtering by values from a control
  • HTML Encoded Data-Binding Expressions
  • Unobtrusive Validation
  • HTML5 Updates
• ASP.NET MVC 4
• ASP.NET Web Pages 2
• Visual Studio 2012 Release Candidate
  • Project Sharing Between Visual Studio 2010 and Visual Studio 2012 Release Candidate (Project Compatibility)
  • Configuration Changes in ASP.NET 4.5 Website Templates
  • Native Support in IIS 7 for ASP.NET Routing
  • HTML Editor
    • Smart Tasks
    • WAI-ARIA support
    • New HTML5 snippets
    • Extract to user control
    • IntelliSense for code nuggets in attributes
    • Automatic renaming of matching tag when you rename an opening or closing tag
    • Event handler generation
    • Smart indent
    • Auto-reduce statement completion
  • JavaScript Editor
    • Code outlining
    • Brace matching
    • Go to Definition
    • ECMAScript5 support
    • DOM IntelliSense
    • VSDOC signature overloads
    • Implicit references
  • CSS Editor
    • Auto-reduce statement completion
    • Hierarchical indentation.
    • CSS hacks support
    • Vendor specific schemas (-moz-,-webkit)
    • Commenting and uncommenting support
    • Color picker
    • Snippets
    • Custom regions
  • Page Inspector
  • Publishing
    • Publish profiles
    • ASP.NET precompilation and merge
• IIS Express

For More Detail click here http://www.asp.net/vnext/overview/aspnet/whats-new#_Toc318097428