I need to create a C# Core.NET project (to be able to run on Linux) but when I create my project with Visual Studio 2017, I can't use the namespace System.IO.Ports even if it is present in Core.NET 2.1.4 which I installed (cf. screenshots)
My question is simple: how should I configure my project to be able to use this feature?
I precise that I already used System.IO.Ports on this computer for Unity3D projects, but in this case Unity3D handles all the Visual Studio configuration. So i really don't know how to do, but I know that it is possible on this computer.
