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.NET Framework Early Access

This repository is the home for .NET Framework Early Access Program. It provides you with all the information you need to participate in .NET Framework Early Access Program. In this program we will share early builds of the next release of the .NET Framework on a regular basis for your feedback. The builds shared via this program are not ready for production and are not supported.

Participation Information

Reporting Issues

Windows Versions

The .NET Framework Build 3745 can be installed on the following Windows versions.


  • Windows 10, version 1809
  • Windows 10, version 1803
  • Windows 10, version 1709
  • Windows 10, version 1703
  • Windows 10, version 1607
  • Windows 8.1
  • Windows 7 SP1


  • Windows Server 2019
  • Windows Server, version 1803
  • Windows Server, version 1709
  • Windows Server 2016
  • Windows Server 2012
  • Windows Server 2012 R2
  • Windows Server 2008 R2 SP1

More Information on the Program

You can use the .NET Framework Early Access builds to try out new features in the .NET Framework and for validating that your apps are compatible with new .NET Framework versions. As a member of the .NET Framework Early Access community, you will have an active role in helping us build new .NET Framework products.

The .NET Framework early access builds will replace any existing .NET Framework 4.x installation on your machine. This means all .NET Framework 4.x applications on your machine will run on the .NET Framework early access builds upon installation. These builds are recommended for testing and not for production deployments.

More Information on the .NET Framework

See this page for information about the latest released version of the .NET Framework that can be used for production deployments on Windows 7, Windows Server 2008 R2 SP1, and later versions of both the client and server Windows families.

Please continue to file .NET Framework released product issues at microsoft/dotnet, .NET Core product issues at dotnet/core, and ASP.NET Core product issues at aspnet/home.


The license of this repository is the MIT LICENSE.

The license of .NET Framework Early Access Builds is the MICROSOFT .NET FRAMEWORK PRE-RELEASE SOFTWARE LICENSE.

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