c#基础做一个简单的银行 只剩下能开户多个能用到其他方法就行了 其他的我都做好了！！！谢谢！

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bank
{
    class BankMethods
    {
        //创建一个对象组
        BankMethods[] banker =new BankMethods[4];
        BankMethods[] banker2 = new BankMethods[1];
        //名字
        private string _name;
        public string Name
        {
            get { return _name; }
            set { this._name = value; }
        }
        //卡号
        private string _id;
        public string Id
        {
            get { return _id; }
            set { this._id = value; }
        }
        //名字
        private string _pwd;
        public string Pwd
        {
            get { return _pwd; }
            set { this._pwd = value; }
        }
        //余额
        private double _balance;
        public double Balance
        {
            get { return _balance; }
            set { this._balance = value; }
        }
        //创建一个老用户的方法
        public void Bank()
        {
            banker[0] = new BankMethods() { Name = "小红", Id = "123456", Pwd = "123", Balance = 500 };
            banker[1] = new BankMethods() { Name = "小明", Id = "123467", Pwd ="123", Balance = 600 };
            banker[2] = new BankMethods() { Name = "小黑", Id = "123458", Pwd = "123", Balance = 700 };
            banker[3] = new BankMethods() { Name = "小王", Id = "123469", Pwd = "123", Balance = 800 };
            foreach (BankMethods b in banker) {
                b.say();
            }
        }
        //遍历出这些银行老用户
        public void say() {
            Console.WriteLine("名字是{0}，卡号是{1}，密码是{2}，余额是{3}", this._name, this._id,this._pwd, this._balance);
        }
        //创建一个余额增加的方法
        public void Increase(double NewMoney) {
            if (NewMoney > 0) {
                this._balance += NewMoney;
            }
        }
        //创建一个余额减少的方法
        public void Reduce(double NewMoney) {
            if (NewMoney <= this._balance && NewMoney > 0) {
                this._balance -= NewMoney;
            }
        }
        //打印提示
        public int Print() {
            Console.WriteLine("====================================================");
            Console.WriteLine("==========欢迎进入自助银行系统==========");
            Console.WriteLine("请选择：1.转账 2.存款 3.取款 4.查询余额 5.开户 6.退出");
            Console.WriteLine("====================================================");
            int result = int.Parse(Console.ReadLine());
            return result;
        }
        //判断卡号和密码是否正确
        public BankMethods Judge(string id,string pwd) {
            foreach (BankMethods judge in banker) {
                if (judge.Id.Equals(id) && judge.Pwd.Equals(pwd)) {
                    return judge;
                }
            }
            foreach (BankMethods judge2 in banker2)
            {
                if (judge2.Id.Equals(id) && judge2.Pwd.Equals(pwd))
                {
                    return judge2;
                }
            }
            return null;
        }
        //判断卡号是否正确
        public BankMethods Judge2(string id)
        {
            foreach (BankMethods jude in banker)
            {
                if (jude.Id.Equals(id))
                {
                    return jude;
                }
            }
            foreach (BankMethods jude2 in banker2)
            {
                if (jude2.Id.Equals(id))
                {
                    return jude2;
                }
            }
            return null;
        }

        //开户
        public void OpenBank() {
            Console.WriteLine("请输入名字");
            string name = Console.ReadLine();
            Console.WriteLine("请输入密码");
            string pwd = Console.ReadLine();
            Console.WriteLine("请输入存款金额");
            double balance = double.Parse(Console.ReadLine());
            Increase(balance);
            string id = "666666";
            this._name = name; this._pwd = pwd; this._id = id; this._balance = balance;
            Console.WriteLine("开户成功！你的名字是{0}，卡号是{1}，密码是{2}，余额是{3}", this._name, this._id, this._pwd, this._balance);
            banker2[0] = new BankMethods() { Name=name,Id=id,Pwd=pwd,Balance=balance};
        }
        //取钱
        public void DrawMoney() {
            Console.WriteLine("请输入卡号");
            string id = Console.ReadLine();
            Console.WriteLine("请输入密码");
            string pwd = Console.ReadLine();
            BankMethods b = Judge(id, pwd);
            if (b == null)
            {
                Console.WriteLine("输入卡号或密码错误");
            }
            else {
                Console.WriteLine("请输入取款金额");
                double money = double.Parse(Console.ReadLine());
                b.Reduce(money);
                Console.WriteLine("取款成功！余额为：" + b.Balance);
            }
        }
        //存钱
        public void Deposit() {
            Console.WriteLine("请输入卡号");
            string id = Console.ReadLine();
            BankMethods b = Judge2(id);
            if (b == null)
            {
                Console.WriteLine("此卡号不存在");
            }
            else {
                Console.WriteLine("请输入存款金额");
                double money = double.Parse(Console.ReadLine());
                b.Increase(money);
                Console.WriteLine("存款成功");
            }
        }
        //转账
        public void Transfer() {
            Console.WriteLine("请输入转账人卡号");
            string id = Console.ReadLine();
            Console.WriteLine("请输入转账人密码");
            string pwd = Console.ReadLine();
            BankMethods b = Judge(id, pwd);
            if (b == null)
            {
                Console.WriteLine("输入错误");
            }
            else {
                Console.WriteLine("请输入收账人卡号");
                string id2 = Console.ReadLine();
                BankMethods b2 = Judge2(id2);
                if (b2 == null)
                {
                    Console.WriteLine("输入错误");
                }
                else {
                    Console.WriteLine("请输入转账金额");
                    double money = double.Parse(Console.ReadLine());
                    b.Reduce(money);
                    b2.Increase(money);
                    Console.WriteLine("转账成功！！！");
                }
            }
        }
        //查询余额
        public void Balances() {
            Console.WriteLine("请输入卡号");
            string id = Console.ReadLine();
            Console.WriteLine("请输入密码");
            string pwd = Console.ReadLine();
            BankMethods b = Judge(id, pwd);
            if (b == null)
            {
                Console.WriteLine("输入错误");
            }
            else {
                Console.WriteLine("您的余额为：" + b.Balance);
            }
        }


    }
    class Program
    {
        static void Main(string[] args)
        {
            //1.转账 2.存款 3.取款 4.查询余额 5.开户 6.退出
            BankMethods bank = new BankMethods();
            bank.Bank();
            do
            {
                switch (bank.Print())
                {
                    case 1:
                        bank.Transfer();
                        continue;
                    case 2:
                        bank.Deposit();
                        continue;
                    case 3:
                        bank.DrawMoney();
                        continue;
                    case 4:
                        bank.Balances();
                        continue;
                    case 5:
                        bank.OpenBank();
                        continue;
                    case 6:
                        break;
                }
                break;
            } while (1 == 1);

        }
    }
}

Answer 1

banker2[0] = new BankMethods() { Name=name,Id=id,Pwd=pwd,Balance=balance};
这里死活都是写入第一个元素，你要多个，需要记录当前有几个账户n，然后用banker2[n-1]=xxx