I had a project which was created in .NETFramework. I have followed the steps on https://learn.microsoft.com/en-us/dotnet/core/porting/ to convert the solution to .NETStandard. In particular all projects in the solution have .NETStandard as the Target Framework There are several packages that are restored using .NETFramework when I clean and build the projects I get errors/warnings like the following:
Warning NU1701 Package 'EntityFramework 6.1.3' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework '.NETStandard,Version=v2.1'. This package may not be fully compatible with your project.
Is there a way in the Package Manager console to run dotnet restore forcing the restore to come from .NETStandard?
Entity Framework 6.1.3 does not support .NET Standard at all, it only supports the .NET Framework; this is because EF 6.1.3 was released in 2015 before .NET Standard was even a thing.
You need to use Entity Framework 6.3.0 or later for compatibility with .NET Standard.
You should use the latest version: Entity Framework 6.4.4.