Microsoft .net Framework 4 Multi Targeting Pack |top| Direct

: .NET Framework 4.0, 4.5, and 4.5.1 have reached their end of life and are no longer supported by Microsoft.

Install only if a modern targeting pack fails to build your .NET 4.0 project. Otherwise, skip it and use the latest Developer Pack for .NET Framework 4.8. microsoft .net framework 4 multi targeting pack

Your Azure DevOps or Jenkins build agents need to compile old code. Without the multi-targeting pack on the build server, automated builds will fail. You need to ensure the v4.0 reference assemblies exist in the build tools' directory. Your Azure DevOps or Jenkins build agents need

: Starting with Visual Studio 2022 , the .NET 4.0 through 4.5.1 targeting packs are no longer included by default. : Starting with Visual Studio 2022 , the

If you cannot live without the Multi-Targeting Pack for 4.0 today, you should be planning your escape:

Traditionally, when you compiled an application targeting .NET Framework 4.0, your build machine required the full runtime and Developer Pack for that specific version. This created friction. If you upgraded Visual Studio, you often lost the ability to compile older frameworks without installing legacy SDKs.