Link netstandard 2.0 dll

Good morning,
I am trying to use a library compiled in Netstandard 2.0 with PyRevit.
The library has been copied into the bin folder and a bundle.yaml has been also created

title: Test C# Script (Custom Title)
tooltip: Test C# Script Tooltip
author: "{{author}}"
highlight: new
  - GShark.dll

The script is very simple

using System;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using GShark.Geometry;

//using pyRevitLabs.NLog;

namespace HelloWorld
    public class MyCSharpCommand : IExternalCommand
        // define the logger field
        //private Logger logger = LogManager.GetCurrentClassLogger();

        public Result Execute(ExternalCommandData revit, ref string message, ElementSet elements)
            Console.WriteLine(string.Format("Point: {0}", new Point3(0,0,0)));
            return Result.Succeeded;

and this is the error message

It would be very helpful to get this to work properly.

I have solved compiling for net48