ArcGISWindowsPhoneSDK.ConvexHull.MyDrawObject_DrawComplete C# (CSharp) Method

        private void MyDrawObject_DrawComplete(object sender, DrawEventArgs args)
        {
            outputGraphicsLayer.ClearGraphics();

            ESRI.ArcGIS.Client.Geometry.MapPoint point = args.Geometry as ESRI.ArcGIS.Client.Geometry.MapPoint;
            point.SpatialReference = MyMap.SpatialReference;
            Graphic graphic = new Graphic()
            {
                Symbol = LayoutRoot.Resources["DefaultMarkerSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol,
                Geometry = point
            };

            inputGraphicsLayer.Graphics.Add(graphic);

            if (inputGraphicsLayer.Graphics.Count >= 3)
                ConvexButton.IsEnabled = true;
        }