public static Collection<Layer> GetLayersToCache()
        {
            Collection<Layer> layersToCache = new Collection<Layer>();

            ShapeFileFeatureSource.BuildIndexFile(AlqaseemDistrictAdminbndy4LayerPath);
            ShapeFileFeatureLayer layer = new ShapeFileFeatureLayer(AlqaseemDistrictAdminbndy4LayerPath, ShapeFileReadWriteMode.ReadOnly);
            layer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.State1;
            layer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            ShapeFileFeatureSource.BuildIndexFile(AlqaseemDistrictStreetsLayerPath);
            ShapeFileFeatureLayer layer2 = new ShapeFileFeatureLayer(AlqaseemDistrictStreetsLayerPath, ShapeFileReadWriteMode.ReadOnly);
            layer2.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.LocalRoad1;
            layer2.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            layersToCache.Add(layer);
            layersToCache.Add(layer2);

            return layersToCache;
        }