private void MyDrawObject_DrawComplete(object sender, DrawEventArgs args)
{
MyDrawObject.IsEnabled = false;
ESRI.ArcGIS.Client.Geometry.Polygon intersectPolygon = args.Geometry as ESRI.ArcGIS.Client.Geometry.Polygon;
intersectPolygon.SpatialReference = MyMap.SpatialReference;
List<Graphic> graphicList = new List<Graphic>();
graphicList.Add(new Graphic() { Geometry = intersectPolygon });
geometryService.SimplifyAsync(graphicList);
}