roslyn: Microsoft.CodeAnalysis.Workspaces.Desktop.dll is missing from the netstandard1.3 version of Microsoft.CodeAnalysis.Workspaces.Common NuGet package

But it is present in the net46 version of that package.

Is that an accident? If yes, how can it be resolved?

Is that on purpose? If so, then why isn’t that assembly included?

Any help would be most appreciated; I am having great difficulties creating a C# Library project (either targetting .NET Standard, or .NET Framework 4.6.2/4.7.1) that uses Roslyn and a corresponding C# .NET Framework-based Unit Test project, and getting them actually building and running. I am using VS 2017 15.4.2.