public bool Edit(Car car)
 {
     try
     {
         F_Car f_cars = new F_Car();
         f_cars.Update(car);
         return true;
     }
     catch (Exception e)
     {
         return false;
     }
 }
 public bool Create(Car car)
 {
     try
     {
         F_Car f_cars = new F_Car();
         f_cars.Insert(car);
         return true;
     }
     catch (Exception e)
     {
         return false;
     }
 }
 public Car Find(int? id)
 {
     if (id == null)
     {
         return null;
     }
     F_Car f_cars = new F_Car();
     Car car = f_cars.Find(id);
     if (car == null)
     {
         return null;
     }
     return car;
 }
 public void Delete(int id)
 {
     F_Car f_cars = new F_Car();
     f_cars.Delete(id);
 }
 public List<Car> List()
 {
     F_Car f_cars = new F_Car();
     List<Car> list = f_cars.List();
     return list;
 }