ArcGISWindowsPhoneSDK.DynamicLayerCode.AddLayer_Click C# (CSharp) Method

        private void AddLayer_Click(object sender, System.EventArgs e)
        {
            (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDrawingOptions = null;

            DynamicLayerInfoCollection myDynamicLayerInfos = (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).DynamicLayerInfos;
            if (myDynamicLayerInfos == null)
                myDynamicLayerInfos = (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).CreateDynamicLayerInfosFromLayerInfos();

            DynamicLayerInfo dli = new DynamicLayerInfo()
            {
                ID = 4,
                Source = new LayerDataSource()
                {
                    DataSource = new TableDataSource()
                    {
                        WorkspaceID = "MyDatabaseWorkspaceIDSSR2",
                        DataSourceName = "ss6.gdb.Lakes"
                    }
                }
            };

            LayerDrawingOptions layerDrawOptions = new LayerDrawingOptions();
            layerDrawOptions.LayerID = 4;
            layerDrawOptions.Renderer = new SimpleRenderer()
            {
                Symbol = new SimpleFillSymbol()
                {
                    Fill = new SolidColorBrush(Color.FromArgb((int)255, (int)0, (int)0, (int)255))
                }
            };

            (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).LayerDrawingOptions =
                new LayerDrawingOptionsCollection() { layerDrawOptions };

            myDynamicLayerInfos.Insert(0, dli);
            (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).DynamicLayerInfos = myDynamicLayerInfos;
            (MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).VisibleLayers = new int[] { 3, 4 };
            // Changing VisibleLayers will refresh the layer, otherwise an explicit call to Refresh is needed.
            //(MyMap.Layers["USA"] as ArcGISDynamicMapServiceLayer).Refresh();
        }