private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            Map1.CurrentExtent = WorldMapKitRenderLayer.DefaultExtent;
            string worldMapKitDataFolder = @"C:\WorldMapKitData";

            LayerOverlay worldMapKitRenderLayerOverlay = new LayerOverlay();

            WorldMapKitRenderLayer worldMapKitRenderLayer = new WorldMapKitRenderLayer(worldMapKitDataFolder);
            worldMapKitRenderLayerOverlay.Layers.Add(worldMapKitRenderLayer);
            Map1.Overlays.Add(worldMapKitRenderLayerOverlay);
        }