private void Configure(IFeatureSet inFeatureSet)
 {
     if (inFeatureSet.FeatureType != FeatureTypes.Polygon)
     {
         throw new PolygonFeatureTypeException();
     }
     PolygonScheme ps = new PolygonScheme(Envelope);
     ps.SetParentItem(this);
     Symbology = ps;
     //ApplyScheme(Symbology);
 }