public string AddBooking(string id, string regNr, DateTime from, DateTime to)
{
Car car = r.GetCar(regNr);
Customer customer = r.GetCustomerById(id);
string bookId = r.AddBooking(car, customer, from, to);
return(bookId);
}
public void AddBooking(Car rentalCar, Customer renter, DateTime startTime, DateTime endTime)
{
Rentals.AddBooking(rentalCar, renter, startTime, endTime);
}