Today, we are happy to announce an early access build of .NET Framework 4.7.1. The .NET Framework 4.7.1 is the next version of the .NET Framework. It is currently feature-complete and in the testing phase. We are asking for individuals and companies to help validate the quality and compatibility of the release. It is not ready for production and is not supported. The current build of the .NET Framework 4.7.1 being shared is build 2538.

You can install .NET Framework 4.7.1 Early Access:

This pre-release build of .NET Framework 4.7.1 includes improvements in several areas:

  • .NET Framework support for .NET Standard 2.0.
  • Enhancements in the Visual Tree for WPF applications.
  • Accessibility improvements in keyboard navigation, narration, high contrast and focus control areas.
  • Support for the more secure SHA256 hashing algorithm.
  • Performance and reliability improvements.

You can see the complete list of improvements on this build in the release notes.

The .NET Framework 4.7.1 will replace any existing .NET Framework 4 and later installation on your machine. This means all .NET Framework 4 and later applications on your machine will run on the .NET Framework early access builds upon installation. Thatís great for testing, but a potential problem for production workloads (at this stage in the release).

Applicable Operating System Platforms

The build being shared installs on the following client operating systems:

  • Windows 10 Creators Update
  • Windows 10 Anniversary Update
  • Windows 8.1
  • Windows 7 SP1

It also installs on the following server platforms:

  • Windows Server 2016
  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows Server 2008 R2 S

The .NET Framework 4.7.1 is also included in the next update for Windows 10. You can sign up for Windows Insiders to validate that your applications work great on the latest .NET Framework included in the latest Windows 10 releases.


Thanks for trying out this pre-release build of .NET Framework 4.7.1. Do let us know what you think. Your feedback is valuable and helps shape a high quality product release. Further details on installing the build and additional information can be found on the .NET Framework Early Access GitHub site.

Source: Welcome to the .NET Framework 4.7.1 Early Access! | .NET Blog