设计模式 外观模式

首先写一个最基本的投资类

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

namespace Face
{


        class Stock1
        {
            public void Sell()
            {
                Console.WriteLine("股票1卖出");
            }
            public void Buy()
            {
                Console.WriteLine("股票1买入");
            }
        }

        class Stock2
        {
            public void Sell()
            {
                Console.WriteLine("股票2卖出");
            }
            public void Buy()
            {
                Console.WriteLine("股票2买入");
            }
        }

        class Stock3
        {
            public void Sell()
            {
                Console.WriteLine("股票3卖出");
            }
            public void Buy()
            {
                Console.WriteLine("股票3买入");
            }
        }
        class NationDebt1
        {
            public void Sell()
            {
                Console.WriteLine("国债1卖出");
            }
            public void Buy()
            {
                Console.WriteLine("国债1买入");
            }
        }

        class Realty1
        {
            public void Sell()
            {
                Console.WriteLine("房地产1卖出");
            }
            public void Buy()
            {
                Console.WriteLine("房地产1买入");
            }
        }
   
}

然后书写一个基金类，隐藏掉。

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

namespace Face
{
    class Fund
    {
        Stock1 gu1;
        Stock2 gu2;
        Stock3 gu3;
        NationDebt1 nd1;
        Realty1 rt1;

        public Fund()
        {
            gu1 = new Stock1();
            gu2 = new Stock2();
            gu3 = new Stock3();
            nd1 = new NationDebt1();
            rt1 = new Realty1();
        }

        public void BuyFund()
        {
            gu1.Buy();
            gu2.Buy();
            gu3.Buy();
            nd1.Buy();
            rt1.Buy();
        }

        public void SellFund()
        {
            gu1.Sell();
            gu2.Sell();
            gu3.Sell();
            nd1.Sell();
            rt1.Sell();
        }

    }
}

最后写测试类

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

namespace Face
{
    class Program
    {
        static void Main(string[] args)
        {
            Fund fund = new Fund();
            fund.BuyFund();
            fund.SellFund();
            Console.Read();

        }
    }
}