Import ShapeFile into Autocad Map

[ennine]

Hi,

I am struggling to import Shp file into Autocad Map, but I do not succeed.

I join hereafter net code, which refers mainly to the following link : here 

I have used both Autocad Map 2017 & 2020. I think I am missing something.

Any help is welcome.

namespace ImportShp
{
    public class ImportShpUtils
    {
        [CommandMethod ("ISHP")]
        public void ImportLayer()
        {
            ImportShpForm layerForm = new ImportShpForm();
            layerForm.Show();
        }
        public void ImportShpProcess(FileInfo shpfileInfo)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            MapApplication mapApp = HostMapApplicationServices.Application;
            using (Importer importer = mapApp.Importer)
            {
                importer.Init("SHP", shpfileInfo.FullName);

                string fileName = Path.GetFileNameWithoutExtension(shpfileInfo.FullName).Replace(" ", "");
                foreach (InputLayer inLayer in importer)
                {
                    inLayer.SetLayerName(LayerNameType.LayerNameDirect, fileName);
                    inLayer.SetDataMapping(ImportDataMapping.NewObjectDataOnly, fileName);
                    inLayer.Dispose();
                }
                importer.ImportPolygonsAsClosedPolylines = true;
                ImportResults result = importer.Import(true);
                sw.Stop();
                importer.Dispose();
            }
            shpfileInfo.Delete();
        }
    }
}