private void MyDrawObject_DrawComplete(object sender, DrawEventArgs args) { MyDrawObject.IsEnabled = false; ESRI.ArcGIS.Client.Geometry.Polyline polyline = args.Geometry as ESRI.ArcGIS.Client.Geometry.Polyline; polyline.SpatialReference = MyMap.SpatialReference; GeometryService geometryService = new GeometryService("http://tasks.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer"); geometryService.CutCompleted += GeometryService_CutCompleted; geometryService.Failed += GeometryService_Failed; geometryService.CutAsync(parcelGraphicsLayer.Graphics.ToList(), polyline); }