ArcGISWindowsPhoneSDK.GenerateRenderer.generateRendererTask_ExecuteCompleted C# (CSharp) Method

        void generateRendererTask_ExecuteCompleted(object sender, GenerateRendererResultEventArgs e)
        {
            GenerateRendererResult rendererResult = e.GenerateRendererResult;

            LayerDrawingOptionsCollection options = (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDrawingOptions != null
                ? (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDrawingOptions : new LayerDrawingOptionsCollection();

            LayerDrawingOptions layerDrawingOptionsParcels = null;

            foreach (LayerDrawingOptions drawOption in options)
                if (drawOption.LayerID == 2)
                {
                    layerDrawingOptionsParcels = drawOption;
                    drawOption.Renderer = rendererResult.Renderer;
                }

            if (e.UserState != null)
            {
                LayerDefinition layerDefinition = new LayerDefinition()
                {
                    LayerID = 2,
                    Definition = e.UserState as string
                };

                (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDefinitions =
                    new System.Collections.ObjectModel.ObservableCollection<LayerDefinition>() { layerDefinition };
            }
            else
                (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDefinitions = null;

            if (layerDrawingOptionsParcels == null)
                options.Add(new LayerDrawingOptions() { LayerID = 2, Renderer = rendererResult.Renderer });

            (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDrawingOptions = options;
            (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).Refresh();
        }