public static void Register(HttpConfiguration config)
        {
            //Generate Breeze entity data model
            using (var context = new CustomerContext())
            {
                config.Routes.MapODataRoute(
                    routeName: "odata",
                    routePrefix: "odata",
                    model: context.GetEdm(),
                    batchHandler: new DefaultODataBatchHandler(GlobalConfiguration.DefaultServer)
                    );
            }

            //enable CORS
            config.EnableCors(new EnableCorsAttribute("*", "*", "*", "DataServiceVersion,MaxDataServiceVersion"));
        }