Паркинг баце

using System;
using System.Collections.Generic;
using System.Text;

namespace SoftUniParking
{
    public class Parking
    {
        List<Car> Cars;
        private int Capacity;

        public int Count
        {
            get { return this.Cars.Count; }
        }

        public Parking(int capacity)
        {
            this.Cars = new List<Car>();
            this.Capacity = capacity;
        }

        public string AddCar(Car car)
        {
            if (!this.Cars.Contains(car))
            {
                if (this.Cars.Count < this.Capacity)
                {
                    this.Cars.Add(car);
                    return $"Successfully added new car {car.Make} {car.RegistrationNumber}";
                }
                else
                {
                    return "Parking is full!";
                }

            }
            else
            {
                return "Car with that registration number, already exists!";
            }
        }

        public string RemoveCar(string registrationNumber)
        {
            foreach (var car in this.Cars)
            {
                if (car.RegistrationNumber == registrationNumber)
                {
                    this.Cars.Remove(car);
                    return $"Successfully removed {registrationNumber}";
                }
            }

            return "Car with that registration number, doesn't exist!";
        }

        public Car GetCar(string registrationNumber)
        {
            foreach (var car in this.Cars)
            {
                if (car.RegistrationNumber == registrationNumber)
                {
                    return car;
                }
            }
            return null;
        }

        public void RemoveSetOfRegistrationNumber(List<string> registrationNumbers)
        {
            foreach (var number in registrationNumbers)
            {
                RemoveCar(number);
            }
        }
    }
}