麻烦前辈帮我看一下这个程序~
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace p3_7
{
  class Program
  {
  static void Main(string[] args)
  {
  BankCard c1 = new BankCard() { id = "001", money = 500 };
  EditCard(c1);
  c1.Query();
  ChangeCard(ref c1);
  c1.Query();
  }
  static void EditCard(BankCard c)
  {
  c.money = 1000;
  c = new BankCard() { id = "002" };
  }
  static void ChangeCard(ref BankCard c)
  {
  c = new BankCard() { id = "002" };
  }
  }
  class BankCard
  {
  public string id;
  public decimal money=0;
  public void Query()
  {
  Console.WriteLine("卡号{0} 余额{1}",id,money);


  }
  }
}


请问这个程序为什么结果是卡号001 然后金额是1000而不是500.。。
哪一句程序将值换了，谢谢大家了！

------解决方案--------------------
BankCard c1 = new BankCard() { id = "001", money = 500 };
↓
c1--> BankCard0{ id = "001", money = 500 } 地址0001

——————————————————————————————————
EditCard(c1)
↓
c1--> BankCard0{ id = "001", money = 500 } 地址0001
c --> BankCard0{ id = "001", money = 500 } 地址0001

c.money = 1000;
↓
c1--> BankCard0{ id = "001", money = 1000} 地址0001
c --> BankCard0{ id = "001", money = 1000} 地址0001

c = new BankCard() { id = "002" };
↓
c1--> BankCard0{ id = "001", money = 1000} 地址0001
c --> BankCard1{ id = "002"} 地址0002