Incompatible .NET Standard assemblies that should have been compatible?
问题 I have a .NET Standard 2.0 DLL project. It has no other references, apart from NETStandard.Library 2.0.1 and all is fine. It is referenced by a WPF application and everything seems to work fine. Once I add a nuget package for System.Collections.Immutable 1.5.0 to the DLL project, a yellow exclamation mark appears on the Dependencies root of the Solution Explorer. (Hm... I now see that the exclamation remains even after I remove this package, but I guess this is a VS bug since everything