c#04-02编写异常处理，实现银行存取款过程中可能遇到的问题

/*纯粹应付作业，简单潦草。勿喷！*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyExceptionMain
{
class Program
{
static void Main(string[] args)
{
double money;
double moneyOut, moneyIn;

moneyIn = Double.Parse(Console.ReadLine());
moneyOut = Double.Parse(Console.ReadLine());

if (moneyOut > moneyIn)
{
throw new MoneyException("取款金额大于余额");
}
else
{
money = moneyIn;
money = money - moneyOut;
Console.WriteLine("剩余金额为： {0}", money);
}

Console.WriteLine("交易结束，请取回卡!");
Console.ReadLine();
}
}
}

public class MoneyException : ApplicationException {
public MoneyException(string msg): base(msg){
Console.WriteLine(msg);
Console.WriteLine("交易结束，请取回卡!");
}

}