public OrdersService()
        {
            var connectionFactory = new NortwindDbConnectionFactory();
            this.ordersDataService = new OrdersDataService(connectionFactory);

            this.ConfigureInMapping();
            this.ConfigureOutMapping();
        }
 public CategoriesService()
 {
     var connectionFactory = new NortwindDbConnectionFactory();
     this.categoriesDataService = new CategoriesDataService(connectionFactory);
 }