.NET 4.5 Features

Core New Features and Improvements
  • Highly supported to Metro Style Apps. Create stunning new GUIs.
  • The new Ribbon control, which enables you to implement a ribbon user interface that hosts a Quick Access Toolbar, Application Menu, and tabs.
  • Ability to reduce system restarts by detecting and closing .NET Framework 4 applications during deployment.
  •  Support for arrays that are larger than 2 gigabytes (GB) on 64-bit platforms. This feature can be enabled in the application configuration file.
  • Better performance through background garbage collection for servers. When you use server garbage collection in the .NET Framework 4.5 RC, background garbage collection is automatically enabled.
  • Background just-in-time (JIT) compilation, which is optionally available on multi-core processors to improve application performance.
  • Ability to limit how long the regular expression engine will attempt to resolve a regular expression before it times out.
  • Ability to define the default culture for an application domain.
  • Console support for Unicode (UTF-16) encoding.
  • Support for versioning of cultural string ordering and comparison data.
  • Better performance when retrieving resources.
  • Zip compression improvements to reduce the size of a compressed file.
  • Ability to customize a reflection context to override default reflection behavior through the CustomReflectionContext class.
  • upport for the 2008 version of the Internationalized Domain Names in Applications (IDNA) standard when the System.Globalization.IdnMapping class is used on Windows 8 Release.
  • Delegation of string comparison to the operating system, which implements Unicode 6.0, when the .NET Framework is used on Windows 8 Release Preview. When running on other platforms, the .NET Framework includes its own string comparison data, which implements Unicode 5.x.
  • Support for generic types.
  • Convention-based programming model that enables you to create parts based on naming conventions rather than attributes.
  • Multiple scopes.
  • Resource File Generator (Resgen.exe) enables you to create a .resw file for use in Windows Metro style apps from a .resources file embedded in a .NET Framework assembly.
  • Support for new HTML5 form types.
  • Support for model binders in Web Forms. These let you bind data controls directly to data-access methods, and automatically convert user input to and from .NET Framework data types.
  • Support for unobtrusive JavaScript in client-side validation scripts.
  • Improved handling of client script through bundling and minification for improved page performance.
  • Integrated encoding routines from the AntiXSS library (previously an external library) to protect from cross-site scripting attacks.
  • Support for WebSockets protocol.
  • Support for reading and writing HTTP requests and responses asynchronously.
  • Support for asynchronous modules and handlers.
  • Support for content distribution network (CDN) fallback in the ScriptManager control.
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