如何创建可以存储多个 inherited/derived 对象的动态对象列表

Question

正在尝试为销售人员创建一个可以增加到任意规模的客户列表。我是 C# 中的 OOP 新手，我不确定我在这里做错了什么。是不是因为我试图将派生对象添加到我的基础列表 class？如果是这样，替代方案是什么？

class Program
    {
        List<Customer> customers = new List<Customer>();

        static void Main(string[] args)
        {
            GetCustomerInfo();
            
        }
        static void GetCustomerInfo()
        {
            int prod1, prod2;
            Console.WriteLine("Please enter the following info.");
            Console.WriteLine("Type '1' for pickup, '2' for delivery: ");
            string option = Console.ReadLine();
            Console.Write("Name: ");
            string name = Console.ReadLine();
            Console.Write("10 digit Phone Number: ");
            string number = Console.ReadLine();
            Console.Write("Quantity of product 1: ");
            bool success = false;
            while (!success)
            {
                success = int.TryParse(Console.ReadLine(), out prod1);
            }
            bool success2 = false;
            while (!success2)
            {
                success2 = int.TryParse(Console.ReadLine(), out prod2);
            }
            if(option == "1")
            {
                Console.WriteLine("Address: ");
                string address = Console.ReadLine();
                customers.Add(new DeliveryCustomer() { Name = name, PhoneNumber = number, Address = address });
            }
            else if (option == "2")
            {
                Console.WriteLine("Pick up time: ");
                string time = Console.ReadLine();
                customers.Add(new PickUpCustomer() { Name = name, PhoneNumber = number, PickUpTime = time });
            }

customers.Add(new PickUpCustomer() { Name = name, PhoneNumber = number, PickUpTime = time });

出现以下错误。非静态字段、方法或属性 'member

需要对象引用

        }

    }

class Customer
    {
        static int productOnePrice = 5;
        static int productTwoPrice = 10;
        private string name;
        private string phoneNumber;             
        private int quantityOfProductOne;
        private int quantityOfProductTwo;

        public Customer()
        {
            name = "";
            phoneNumber = "";
            quantityOfProductOne = 0;
            quantityOfProductTwo = 0;
        }
        public string Name 
        {
            get => name;
            set => name = value;
        }

        public string PhoneNumber
        {
            get => phoneNumber;
            set
            {
                if(value.Length != 10)
                {
                    Console.WriteLine("Invalid number. Must be 10 digits.");
                }
                else
                {
                    phoneNumber = value;
                }
            }
        }

        public int QuantityOfProductOne
        {
            get => quantityOfProductOne;
            set => quantityOfProductOne = value;

        }

        public int QuantityOfProductTwo
        {
            get => quantityOfProductTwo;
            set => quantityOfProductTwo = value;

        }
    
        }
class DeliveryCustomer : Customer
{
    private string address;

    public string Address
    {
        get => address;
        set => address = value;
    }
        
    public DeliveryCustomer()
    {
        address = "";
        }
    
    }
class PickUpCustomer : Customer
{
    private string pickUpTime;

    public string PickUpTime
    {
        get => pickUpTime;
        set => pickUpTime = value;
    }

    public PickUpCustomer()
    {
        pickUpTime = "";
    }
}

如果这是一个愚蠢的问题，我深表歉意，我只是无法理解一些 OOP 概念。

Answer 1

GetCustomerInfo()是一个静态方法，而List<Customer> customers是一个实例字段，你可能无法从静态方法访问实例字段，所以希望让客户成为静态字段应该解决问题

如何创建可以存储多个 inherited/derived 对象的动态对象列表

How can I create a dynamic List of objects that can store multiple inherited/derived objects

c#

oop