【C#】52 張撲克牌，亂數洗牌

老哥的其中一個面試題目
做法似乎有很多，不過還是要寫寫看
畢竟c#已經離我有點久遠了

這是題目
Write a high performance program to shuffle the poker card.

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

namespace ConsoleApplication1
{
    class globalvar
    {
        public static ArrayList sufflecard = new ArrayList();
        public static ArrayList allcard = new ArrayList();
        public static string[] match = new string[] {"K","A","2","3","4","5","6","7","8","9","10","J","Q"};
    }

    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 1; i <=52; i++)
            {
                globalvar.allcard.Add(i);
            }
            shuffle();
            Console.WriteLine("done!");
            Console.ReadLine();
        }

        private static void shuffle()
        {
            Random locate = new Random();
            while (globalvar.allcard.Count!=0)
            {
                int randomnum = locate.Next(globalvar.allcard.Count);
                int sufflenum = Convert.ToInt32(globalvar.allcard[randomnum]);
                globalvar.allcard.RemoveAt(randomnum);
                globalvar.sufflecard.Add(sufflenum);
                
                int 花色 = sufflenum/13;
                int 點數位置 = sufflenum%13;
                string 點數 = globalvar.match[點數位置];

                switch (花色)
                {
                    case 0:
                        Console.WriteLine("黑桃"+點數);
                        break;
                    case 1:
                        Console.WriteLine("紅心"+點數);
                        break;
                    case 2:
                        Console.WriteLine("磚塊" + 點數);
                        break;
                    case 3:
                        Console.WriteLine("梅花" + 點數);
                        break;
                    default:
                        break;
                }
            }
            Console.WriteLine(globalvar.sufflecard.Count+"張卡已洗好，剩餘"+globalvar.allcard.Count+"張");

        }
        
    }
}

高不高效我不知道，至少他跑得出來就偷笑了 XDDDDDD