public ActionResult Index()
 {
     using (CarsDbContext context = new CarsDbContext()) {
         List<Car> cars = context.Cars.ToList();
         return View(cars.ToList());
     }
 }
 public void When_a_car_is_saved_in_the_database_it_should_succeed()
 {
     CarsDbContext context = new CarsDbContext(base.ConnectionString);
     context.Cars.Add(new Car() {
         Make = "make",
         Model = "model",
     });
     context.SaveChanges();
 }