Your manager says, "Just change the Target Framework dropdown to 4.0."
However, pragmatism wins in enterprise software. If you have a 100,000-line WinForms app that uses WebClient (not HttpClient ) and third-party DLLs from a defunct vendor, net framework 4.0 targeting pack
If you have the choice, target .NET Framework 4.7.2 or 4.8. They are much easier to install. But if you are stuck in 4.0, save this blog post, bookmark the SDK download, and know that you are not alone. Your manager says, "Just change the Target Framework
In the modern era of .NET 8, .NET 9, and the cross-platform magic of MAUI, it is easy to forget that a massive portion of enterprise software still runs on the shoulders of a giant released over a decade ago: . But if you are stuck in 4
dir "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\" If you see v4.0 , you are good. If not, reinstall the SDK. Modern NuGet (v6+) sometimes refuses to restore packages for net40 . You need to add this to your nuget.config :