.NET 5.0.404 SDK gives System.Core error in macOS.

[ayankumaar]

I have created a nuget package. In that I have a .target file. In the target file under a task I am doing

<Reference Include="System.Core".

When I add the nuget package in my code and run a dotnet build command, I am getting the following error:

error MSB3755: Could not find reference "System.Core". If this reference is required by your code, you may get compilation errors.

I am just wondering is System.Core supported in MAC ? If not, what is the alternative I have ?

If it is present in MAC then is it loaded from the GAC ? If yes, then what is the location of the GAC in MAC ?

[Rick-Anderson]

Why are you trying to use <Reference Include="System.Core" with .NET 5?