A developer platform for building all your apps.
.NET Framework content previously digitally signed using certificates that use the SHA-1 algorithm will be retired in order to support evolving industry standards.
This version of .NET Framework will reach end of support on April 26, 2022. After this date, security fixes, updates, and technical support for these versions will no longer be provided.
Update your deployed runtime to a more recent version, such as .NET Framework 4.6.2 before April 26, 2022 in order to continue to receive updates and technical support.
For more information, see the SHA-1 retirement plan, the .NET 4.5.2, 4.6, and 4.6.1 lifecycle update blog post, and the FAQ.
Do you want to run apps? The runtime includes everything you need to run existing apps/programs built with .NET Framework.
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Do you want to build apps? The developer pack is used by software developers to create applications that run on .NET Framework, typically using Visual Studio.