ArcMapAddinVisibility.ViewModels.TabBaseViewModel.AddGraphicToMap C# (CSharp) Метод

        internal string AddGraphicToMap(IGeometry geom, IColor color, bool IsTempGraphic = false, esriSimpleMarkerStyle markerStyle = esriSimpleMarkerStyle.esriSMSCircle, int size = 5)
        {
            if (geom == null || ArcMap.Document == null || ArcMap.Document.FocusMap == null)
                return string.Empty;

            IElement element = null;
            double width = 2.0;

            geom.Project(ArcMap.Document.FocusMap.SpatialReference);

            if (geom.GeometryType == esriGeometryType.esriGeometryPoint)
            {
                // Marker symbols
                var simpleMarkerSymbol = new SimpleMarkerSymbol() as ISimpleMarkerSymbol;
                simpleMarkerSymbol.Color = color;
                simpleMarkerSymbol.Outline = true;
                simpleMarkerSymbol.OutlineColor = color;
                simpleMarkerSymbol.Size = size;
                simpleMarkerSymbol.Style = markerStyle;

                var markerElement = new MarkerElement() as IMarkerElement;
                markerElement.Symbol = simpleMarkerSymbol;
                element = markerElement as IElement;
            }
            else if (geom.GeometryType == esriGeometryType.esriGeometryPolyline)
            {
                // create graphic then add to map
                var le = new LineElementClass() as ILineElement;
                element = le as IElement;

                var lineSymbol = new SimpleLineSymbolClass();
                lineSymbol.Color = color;
                lineSymbol.Width = width;

                le.Symbol = lineSymbol;
            }
            else if (geom.GeometryType == esriGeometryType.esriGeometryPolygon)
            {
                // create graphic then add to map
                IPolygonElement pe = new PolygonElementClass() as IPolygonElement;
                element = pe as IElement;
                IFillShapeElement fe = pe as IFillShapeElement;

                var fillSymbol = new SimpleFillSymbolClass();
                RgbColor selectedColor = new RgbColorClass();
                selectedColor.Red = 0;
                selectedColor.Green = 0;
                selectedColor.Blue = 0;

                selectedColor.Transparency = (byte)0;
                fillSymbol.Color = selectedColor;

                fe.Symbol = fillSymbol;
            }

            if (element == null)
                return string.Empty;

            element.Geometry = geom;

            var mxdoc = ArcMap.Application.Document as IMxDocument;
            var av = mxdoc.FocusMap as IActiveView;
            var gc = av as IGraphicsContainer;

            // store guid
            var eprop = element as IElementProperties;
            eprop.Name = Guid.NewGuid().ToString();

            if (IsTempGraphic)
                TempGraphicsList.Add(eprop.Name);
            else
                MapGraphicsList.Add(eprop.Name);

            gc.AddElement(element, 0);

            av.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

            RaisePropertyChanged(() => HasMapGraphics);

            return eprop.Name;
        }