Csharp 如何解决无效的初始化程序成员声明器错误 C#，从 CSV 文件读取

我有一个班级预订，其中所有的信息来自2个其他类别的客户和沃图伊格.

我需要读取预留文本文件中的写入信息，并且我收到错误消息"INVALID INVALIZATE INITIALIZER MEMBER DECLARATOR".和"集合初始值设定项需要其类型‘Reserve’来实现System.Collections.IEnumerable."

这是我的预约课程:

   public class Reservation
    {
        public string fullpath = $@"{AppDomain.CurrentDomain.BaseDirectory}\Reservation.txt";

        private Customer _customer;
        private Voertuig _vehicle;

        public Customer Customers
        {
            get { return _customer ?? (_customer = new Customer()); }
            set { _customer = value; }
        }

        public Voertuig Vehicles
        {
            get { return _vehicle ?? (_vehicle = new Voertuig()); }
            set { _vehicle = value; }
        }
        public Reservation(): this(new Customer(), new Voertuig())
        {

        }

        public Reservation(Customer customer, Voertuig vehicle)
        {
            _customer = customer;
            _vehicle = vehicle;
        }

        public void Create()
        {
            try
            {
                if (File.Exists(fullpath))
                {
                    StreamWriter sw = new StreamWriter(fullpath, true);

                    var record = $"{Customers.Firstname};{Customers.Lastname};{Customers.Age};{Customers.Phonenumber};{Vehicles.Type};{Vehicles.Electric};{Vehicles.RequiredAge};{Vehicles.Wheels};{Vehicles.PersonsCanRide};{Vehicles.AllowedSpeed}";

                    sw.WriteLine(record);

                    sw.Close();
                    sw.Dispose();
                }
            }
            catch (IOException ioex)
            {
                throw new Exception(ioex.Message);
            }
        }

        public List<Reservation> ReadFromCsv()
        {
            List<Reservation> _reservation = new List<Reservation>();

            try
            {

                if (File.Exists(fullpath))
                {

                    using (StreamReader reader = new StreamReader(fullpath))
                    {

                        string record = reader.ReadLine();

                        while (record != null)
                        {
                            string[] fields = record.Split(new char[] { ';' });

                            Reservation res = new Reservation
                            {
                                // error CS1922: Cannot initialize type 'Reservation' with a collection initializer
                                // because it does not implement 'System.Collections.IEnumerable'

                                // error CS0747: Invalid initializer member declarator
                                Customers.Firstname = fields[0],
                                Customers.Lastname = fields[1],
                            };
                            _reservation.Add(res);

                            record = reader.ReadLine();
                        }
                    }
                }
            }
            catch (IOException ioEx)
            {
                throw new Exception(ioEx.Message);
            }
            return _reservation;
        }
    }

我判断了这question个，但似乎不是同一个问题.

我是否需要在预订类中为所有客户和车辆属性创建属性？