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 Customer GetCustomerById(int id)
{
Customer customer = Rentals.GetCustomerById(id);
return(customer);
}