The Web installer is a small package that automatically determines and downloads only the components applicable for a particular platform. The offline package can be used in situations where the web installer cannot be used due to lack of internet connectivity.
Overview
The .NET Framework is a development platform for building apps for Windows, Windows Phone, Windows Server, and Windows Azure. It consists of the common language runtime (CLR) and the .NET Framework class library, which includes classes, interfaces, and value types that support an extensive range of technologies. The .NET Framework provides a managed execution environment, simplified development and deployment, and integration with a variety of programming languages, including Visual Basic and Visual C#.
What's New in the .NET Framework 4.5.1
Here are some of the new key features of .NET Framework 4.5.1:
Core new features and enhancements:
- Automatic binding redirection for assemblies. Starting with Visual Studio 2013, when you compile an app that targets the .NET Framework 4.5.1, binding redirects may be added to the app configuration file if your app or its components reference multiple versions of the same assembly. You can also enable this feature for projects that target older versions of the .NET Framework.
- Ability to collect diagnostics information to help developers improve the performance of server and cloud applications.
- Ability to explicitly compact the large object heap (LOH) during garbage collection.
- Additional performance improvements such as ASP.NET app suspension, multi-core JIT improvements, and faster app startup after a .NET Framework update.
Improvements when debugging your .NET Framework apps in Visual Studio 2013:
- Return values in the Visual Studio debugger. When you debug a managed app in Visual Studio 2013, the Autos window displays return types and values for methods. This information is available for desktop, Windows Store, and Windows Phone apps.
- Edit and Continue for 64-bit apps. Visual Studio 2013 supports the Edit and Continue feature for 64-bit managed apps for desktop, Windows Store, and Windows Phone. The existing limitations remain in effect for both 32-bit and 64-bit apps.
- Async-aware debugging. To make it easier to debug asynchronous apps in Visual Studio 2013, the call stack hides the infrastructure code provided by compilers to support asynchronous programming, and also chains in logical parent frames so you can follow logical program execution more clearly. A Tasks window replaces the Parallel Tasks window and displays tasks that relate to a particular breakpoint, and also displays any other tasks that are currently active or scheduled in the app.
- Better exception support for Windows Runtime components. In Windows 8.1, exceptions that arise from Windows Store apps preserve information about the error that caused the exception, even across language boundaries.
The .NET Framework 4.5.1 runs side-by-side with the .NET Framework 3.5 SP1 and earlier versions, but performs an in-place update for the .NET Framework 4 and the .NET Framework 4.5.
Download Microsoft .NET Framework 4.5.1
The links in this section correspond to files available for this download. Click on the "Download" button to start the download:
- Download Microsoft .NET Framework 4.5.1 (Web Installer)
- Download Microsoft .NET Framework 4.5.1 (Offline Installer)
System requirements
Supported operating systems:
- Windows Vista SP2 (x86 and x64)
- Windows 7 SP1 (x86 and x64)
- Windows Server 2008 R2 SP1 (x64)
- Windows Server 2008 SP2 (x86 and x64)
Hardware Requirements:
- 1 GHz or faster processor
- 512 MB of RAM
- 850 MB of available hard disk space (x86)
- 2 GB hard drive (x64)
Reference:
What's New in the .NET Framework 4.5
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