ArcGISWindowsPhoneSDK.BufferPoint.myDrawObject_DrawComplete C# (CSharp) Method

        void myDrawObject_DrawComplete(object sender, DrawEventArgs e)
        {
            myDrawObject.IsEnabled = false;
            GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
            graphicsLayer.ClearGraphics();

            Graphic graphic = new ESRI.ArcGIS.Client.Graphic()
            {
                Geometry = e.Geometry,
                Symbol = LayoutRoot.Resources["DefaultClickSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol
            };
            graphic.SetZIndex(1);
            graphicsLayer.Graphics.Add(graphic);

            GeometryService geometryService =
              new GeometryService("http://serverapps101.esri.com/arcgis/rest/services/Geometry/GeometryServer");
            geometryService.BufferCompleted += GeometryService_BufferCompleted;
            geometryService.Failed += GeometryService_Failed;

            BufferParameters bufferParams = new BufferParameters()
            {
                Unit = LinearUnit.StatuteMile,
                OutSpatialReference = MyMap.SpatialReference,
                Geodesic = true
            };
            bufferParams.Features.Add(graphic);
            bufferParams.Distances.Add(5);

            geometryService.BufferAsync(bufferParams);
        }