public int UpdateGuestVehicle(GuestVehicle oldVehicle, GuestVehicle vehicle)
        {
            int            result       = 0;
            VMGuestVehicle oldVMVehicle = new VMGuestVehicle()
            {
                GuestID         = oldVehicle.GuestID,
                Make            = oldVehicle.Make,
                Model           = oldVehicle.Model,
                PlateNumber     = oldVehicle.PlateNumber,
                Color           = oldVehicle.Color,
                ParkingLocation = oldVehicle.ParkingLocation
            };
            VMGuestVehicle newVMVehicle = new VMGuestVehicle()
            {
                GuestID         = vehicle.GuestID,
                Make            = vehicle.Make,
                Model           = vehicle.Model,
                PlateNumber     = vehicle.PlateNumber,
                Color           = vehicle.Color,
                ParkingLocation = vehicle.ParkingLocation
            };

            for (int i = 0; i < vehicles.Count; i++)
            {
                VMGuestVehicle currentVehicle = vehicles[i];
                if (currentVehicle.Equals(oldVMVehicle))
                {
                    vehicles[i] = newVMVehicle;
                    ++result;
                }
            }

            return(result);
        }