public class ParcelLayerCreationParams : LayerCreationParams 

string path = @"C:\MyTestData\MyFileGeodatabase.gdb\MyFeatureDS\MyFabric";
await QueuedTask.Run(() =>
{
  var lyrCreateParams = new ParcelLayerCreationParams(new Uri(path));
  try
  {
    var parcelLayer = LayerFactory.Instance.CreateLayer<ParcelLayer>(
      lyrCreateParams, MapView.Active.Map);
  }
  catch (Exception ex)
  {
    MessageBox.Show(ex.Message, "Add Parcel Fabric Layer");
  }
});