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private void MyMap_MouseClick(object sender, ESRI.ArcGIS.Client.Map.MouseEventArgs e) { _gpTask.CancelAsync(); GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer; graphicsLayer.ClearGraphics(); e.MapPoint.SpatialReference = MyMap.SpatialReference; Graphic graphic = new ESRI.ArcGIS.Client.Graphic() { Geometry = e.MapPoint, Symbol = LayoutRoot.Resources["DefaultClickSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol }; graphic.SetZIndex(1); graphicsLayer.Graphics.Add(graphic); // Build paramaters List<GPParameter> gpParams = new List<GPParameter>(); double dist = System.Convert.ToDouble(500); // Old code from Buffer sample (single graphic approach) //var g = new Graphic { Geometry = e.MapPoint }; //var fs = new FeatureSet(new List<Graphic> { g }); List<Graphic> graphicsList = new List<Graphic>(); Random random = new Random(); for (int i = 0; i < 5; i++) { var g = new Graphic { Geometry = new MapPoint(random.Next(-20000000, 20000000), random.Next(-20000000, 20000000), MyMap.SpatialReference), }; graphicsList.Add(g); } var fs = new FeatureSet(graphicsList); gpParams.Add(new GPFeatureRecordSetLayer("InputFeatures", fs)); gpParams.Add(new GPLinearUnit("Distance", esriUnits.esriKilometers, dist)); _gpTask.ExecuteCompleted += (s, e1) => { GPExecuteResults results = e1.Results; GPFeatureRecordSetLayer rs = results.OutParameters[0] as GPFeatureRecordSetLayer; List<Graphic> resultGraphics = new List<Graphic>(); for (int i = 0; i < rs.FeatureSet.Features.Count; i++) { Graphic graphicBuff = new ESRI.ArcGIS.Client.Graphic() { Geometry = rs.FeatureSet.Features.Geometry, Symbol = LayoutRoot.Resources["DefaultFillSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol }; resultGraphics.Add(graphicBuff); } graphicsLayer.Graphics.AddRange(resultGraphics); }; _gpTask.Failed += (s2, e2) => { MessageBox.Show(e2.Error.Message); }; _gpTask.ExecuteAsync(gpParams); }