//Rent
public bool RentStart(int customerId, int carId)
{
var customer = repo.GetCustomer(customerId);
if (customer == null)
{
throw new ApplicationException("Customer doesn't exist!");
}
var car = repo.GetCar(carId);
if (car == null)
{
throw new ApplicationException("Car doesn't exist!");
}
return(repo.RentStart(customerId, carId));
}
public Car GetCar(int carId)
{
return(repo.GetCar(carId));
}