Cannot build solution in Visual Studio 2019

I cannot build the StyleCopAnalyzers solution using my installation of Visual Studio 2019 Community.

I downloaded the (now) latest commit (b15704e), opened StyleCopAnalyzers.sln, and all projects failed to load.

When I try to manually reload the StyleCop.Analyzers project, an error messagebox appears with the message “The operation could not be completed” and meanwhile I see the following errors in Solution tab of Output window:

e:\prog\repos\StyleCopAnalyzers\StyleCop.Analyzers\StyleCop.Analyzers\StyleCop.Analyzers.csproj : error  : The project file cannot be opened by the project system, because it is missing some critical imports or the referenced SDK cannot be found.

Detailed Information:
Unable to locate the .NET Core SDK. Check that it is installed and that the version specified in global.json (if any) matches the installed version.

I have tried to fix the problem by looking at the targeted frameworks for projects, e.g. netstandard1.1;net452 in case of StyleCop.Analyzers, but I did not find any .NET Core references that would be missing.

I have most components installed in VS19 installer, click for images

So I don’t understand what could be missing that is related to .NET Core. I did not want to blindly install all legacy .NET Core versions so I am writing this issue.

Also, a “Building” part for the README would be really useful to avoid problems like this.

• VS version: Microsoft Visual Studio Community 2019 Version 16.4.3
• Result of dotnet --list-sdks:

2.1.801 [C:\Program Files\dotnet\sdk]
2.1.802 [C:\Program Files\dotnet\sdk]
2.2.402 [C:\Program Files\dotnet\sdk]
3.1.101 [C:\Program Files\dotnet\sdk]

[arphox]

After I installed the .NET Core 2.1.504 x64 package, I could build the solution. Thank you so much for your help!

[jnm2]

@sharwell There’s finally documentation: https://docs.microsoft.com/en-us/dotnet/core/tools/global-json?tabs=netcore3x#rollforward

I’ve been seeing "rollForward": "feature" the most.