在mapXtreme中根据地图点跟半径画的圆背景色怎么填充,目前画出的只有个圆圈
MapInfo.Geometry.LegacyArc lArc = new MapInfo.Geometry.LegacyArc(this.mapControl.Map.GetDisplayCoordSys(), dPoint, 20, 20, MapInfo.Geometry.DistanceUnit.Kilometer, MapInfo.Geometry.DistanceType.Spherical, 0, 360);
LineWidth lWidth = new LineWidth(3, LineWidthUnit.Pixel);
MapInfo.Styles.SimpleInterior simpleInterior = new SimpleInterior(2, Color.Red, Color.PowderBlue, true);
MapInfo.Styles.SimpleLineStyle simpleLine = new SimpleLineStyle(lWidth, 2, Color.Red);
MapInfo.Styles.AreaStyle sty = new AreaStyle(simpleLine, simpleInterior);
Feature oftr = new Feature(lArc, sty);
tblTemp.InsertFeature(oftr);