public class mwMapLayer : InMemoryFeatureLayer
    {
        private string IdColumnName;
        private string Longitude;
        private string Latitude;
        private string Polygon;
        private bool ifPolygon = false;
        public bool ifFeaturesInitialized = true;

        public mwMapLayer(string idcolumnname, string longitude, string latitude, bool ifpolygon)
        {
            IdColumnName = idcolumnname;
            Longitude = longitude;
            Latitude = latitude;
            ifPolygon = ifpolygon;
            if (ifPolygon)
                Polygon = longitude;

            if (!SetupFeatures())
                ifFeaturesInitialized = false;
        }

        public bool SetupFeatures()
        {
	    // the wkt is from you errordata.txt
            string wkt = File.ReadAllText(@"d:\wkt.txt");

            Feature feature = new Feature(wkt, IdColumnName); ;

            feature.ColumnValues.Add("num", "6687");
            feature.ColumnValues.Add("name", "Atlantic");

            InternalFeatures.Add(feature);

            return true;
        }
    }

private void BuildDetailLayer()
        {
            //Setup Detail Layer

            mwMapLayer DetailLayer = new mwMapLayer("name", "location", "", true);

            if (DetailLayer.ifFeaturesInitialized)
            {
                DetailLayer.Open();
                DetailLayer.Columns.Add(new FeatureSourceColumn("TotalSelected"));

                DetailLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

                ClassBreakStyle Breaks = new ClassBreakStyle("TotalSelected");

                for (int j = 0; j < 5; j++)
                {
                    AreaStyle aStyle = AreaStyles.Country1;
                }

                DetailLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(Breaks);

                DetailLayer.Close();

                LayerOverlay Layer = new LayerOverlay();
                Layer.Layers.Add("DetailLayer1", DetailLayer);
                winformsMap1.Overlays.Add("DetailLayer", Layer);

                DetailLayer.FeatureSource.Open();
                winformsMap1.CurrentExtent = DetailLayer.FeatureSource.GetBoundingBox();
                DetailLayer.FeatureSource.Close();
            }
        }