C#洗牌算法

protected void Button1_Click(object sender, EventArgs e)

    {

        string[] qian = new string[52]{"Ahe", "2he", "3he", "4he", "5he", "6he", "7he", "8he", "9he", "10he", "Jhe", "Qhe", "Khe",

            "Ah","2h","3h","4h","5h","6h","7h","8h","9h","10h","Jh","Qh","Kh","Am", "2m", "3m", "4m", "5m", "6m", "7m", "8m", "9m", "10m", "Jm", "Qm", "Km",

            "Af", "2f", "3f", "4f", "5f", "6f", "7f", "8f", "9f", "10f", "Jf", "Qf", "Kf"};

        Response.Write("洗牌前"+"<br>");

        foreach (string s1 in qian)

        {

            Response.Write(s1 + " ");

        }

        System.Random r1 = new Random();

       // System.Random r2 = new Random();

        for (int j = 0; j < 5200; j++)

        {

            int a = Convert.ToInt32(r1.Next(0, 51));

            int b = Convert.ToInt32(r1.Next(0, 51));

            string t = string.Empty;

                t = qian[a];

                qian[a] = qian[b];

                qian[b] = t;

        }

        Response.Write("<br>"+"洗牌后：" + "<br>");

        foreach (string s in qian)

        {

            Response.Write(s + " ");

        }

    }