遊戲介面如下所示：
首先我們必須知道要建立三個類玩家類，電腦類，裁判類
1玩家類中的程式碼為

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

namespace PlayGame
{
    class Player
    {
        public int showFist(string str)
        {
            int num = 0;
            switch (str)
            {
                case
 
 "剪刀": num = 1; break;
                case "石頭": num = 2; break;
                case "布": num = 3; break;

            }
            return num;

        }
    }
}

2電腦類中的程式碼為

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

namespace PlayGame
{
    class Computer
    {
        ///
 
 <summary>
        /// 儲存電腦出的拳頭
        /// </summary>
        public string fist
        {
            get;
            set;
        }
        public int cpuShowFist()
        {
            Random r = new Random();
           int cnum=r.Next(1,4);
           switch(cnum)
           {
               case
 
 1: this.fist = "剪刀"; break;
               case 2: this.fist = "石頭"; break;
               case 3: this.fist = "布"; break;
           }
           return cnum;
        }
    }
}

3裁判類中的程式碼為

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

namespace PlayGame
{
    class Judge
    {
        public  enum Result
        { 
        電腦贏,玩家贏,平局
        }
        public static Result caipan(int playerNum, int cpuNum)
        {
            if ((playerNum - cpuNum) == 1 || (playerNum - cpuNum) == -2)
               return Result.玩家贏;
            else if((playerNum-cpuNum)==0)
                return Result.平局;
            else
                return Result.電腦贏;
        }
    }
}

4其他的事件程式碼

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace PlayGame
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btncut_Click(object sender, EventArgs e)
        {

            NewMethod(btncut.Text);

        }

        private void NewMethod(string str)
        {
            lblPlayer.Text = str;
            Player player = new Player();
            int playerNum = player.showFist(str);

            Computer cpu = new Computer();
            int cpuNum = cpu.cpuShowFist();
            lblComputer.Text = cpu.fist;

            PlayGame.Judge.Result res = Judge.caipan(playerNum, cpuNum);
            lblJudge.Text = res.ToString();
        }



        private void btnstone_Click(object sender, EventArgs e)
        {
            NewMethod(btnstone.Text);
        }

        private void btnbu_Click(object sender, EventArgs e)
        {
            NewMethod(btnbu.Text);
        }
    }
}