public IReadOnlyList<long> Points {get;}

{
  string sReportResult = "Polygon Information --" + Environment.NewLine;
  string sParcelTypeName = "tax";
  string errorMessage = await QueuedTask.Run(async () =>
  {
    var myParcelFabricLayer =
      MapView.Active.Map.GetLayersAsFlattenedList().OfType<ParcelLayer>().FirstOrDefault();
    //if there is no fabric in the map then bail
    if (myParcelFabricLayer == null)
      return "There is no fabric layer in the map.";

    //first get the parcel type feature layer
    var featSrcLyr = myParcelFabricLayer.GetParcelPolygonLayerByTypeNameAsync(sParcelTypeName).Result.FirstOrDefault();

    if (featSrcLyr.SelectionCount == 0)
      return "There is no selection on the " + sParcelTypeName + " layer.";

    sReportResult += " Parcel Type: " + sParcelTypeName + Environment.NewLine;
    sReportResult += " Poygons: " + featSrcLyr.SelectionCount + Environment.NewLine + Environment.NewLine;

    try
    {
      // ------- get the selected parcels ---------
      var ids = new List<long>((featSrcLyr as FeatureLayer).GetSelection().GetObjectIDs());
      var sourceParcels = new Dictionary<MapMember, List<long>>
      {
        { featSrcLyr, ids }
      };
      //---------------------------------------------
      ParcelFeatures parcFeatures =
                      await myParcelFabricLayer.GetParcelFeaturesAsync(SelectionSet.FromDictionary(sourceParcels));
      //since we know that we want to report on Tax lines only, and for this functionality 
      // we can use any of the Tax line layer instances (if there happens to be more than one)
      // we can get the first instance as follows
      FeatureLayer myLineFeatureLyr =
          myParcelFabricLayer.GetParcelLineLayerByTypeNameAsync(sParcelTypeName).Result.FirstOrDefault();
      if (myLineFeatureLyr == null)
        return sParcelTypeName + " line layer not found";

      FeatureLayer myPointFeatureLyr =
          myParcelFabricLayer.GetPointsLayerAsync().Result.FirstOrDefault();
      if (myPointFeatureLyr == null)
        return "fabric point layer not found";

      var LineInfo = parcFeatures.Lines; //then get the line information from the parcel features object
                                         //... and then do some work for each of the lines
      int iRadiusAttributeCnt = 0;
      int iDistanceAttributeCnt = 0;
      sReportResult += "Line Information --";
      foreach (KeyValuePair<string, List<long>> kvp in LineInfo)
      {
        if (!kvp.Key.Equals(sParcelTypeName, StringComparison.CurrentCultureIgnoreCase))
          continue; // ignore any other lines from different parcel types

        foreach (long oid in kvp.Value)
        {
          var insp = myLineFeatureLyr.Inspect(oid);
          var dRadius = insp["RADIUS"];
          var dDistance = insp["DISTANCE"];

          if (dRadius != DBNull.Value)
            iRadiusAttributeCnt++;
          if (dDistance != DBNull.Value)
            iDistanceAttributeCnt++;
          //Polyline poly = (Polyline)insp["SHAPE"];
        }
        sReportResult += Environment.NewLine + " Distance attributes: " + iDistanceAttributeCnt.ToString();
        sReportResult += Environment.NewLine + " Radius attributes: " + iRadiusAttributeCnt.ToString();
      }

      var PointInfo = parcFeatures.Points; //get the point information from the parcel features object
                                           //... and then do some work for each of the points
      sReportResult += Environment.NewLine + Environment.NewLine + "Point Information --";
      int iFixedPointCnt = 0;
      int iNonFixedPointCnt = 0;
      foreach (long oid in PointInfo)
      {
        var insp = myPointFeatureLyr.Inspect(oid);
        var isFixed = insp["ISFIXED"];
        if (isFixed == DBNull.Value || (int)isFixed == 0)
          iNonFixedPointCnt++;
        else
          iFixedPointCnt++;
        // var pt = insp["SHAPE"];

      }
      sReportResult += Environment.NewLine + " Fixed Points: " + iFixedPointCnt.ToString();
      sReportResult += Environment.NewLine + " Non-Fixed Points: " + iNonFixedPointCnt.ToString();
    }
    catch (Exception ex)
    {
      return ex.Message;
    }
    return "";
  });
  if (!string.IsNullOrEmpty(errorMessage))
    MessageBox.Show(errorMessage, "Get Parcel Features");
  else
    MessageBox.Show(sReportResult, "Get Parcel Features");
}