有规律的随机数

using System;
using System.Collections;

namespace RandomDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Hashtable ht0 = new Hashtable();
            for (int i = 0; i < 6; i++)
            {
                do
                {
                    Random rnd = new Random((unchecked((int)(DateTime.Now.Ticks))));
                    int tmp = rnd.Next(0, 100);
                    if (!ht0.ContainsValue(tmp))
                    {
                        ht0.Add(i, tmp);
                        break;
                    }
                }
                while (true);
            }
            Console.WriteLine("===============");
            foreach (var item in ht0.Values)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("===============");

            Hashtable ht1 = new Hashtable();
            for (int i = 0; i < 6; i++)
            {
                do
                {
                    Random rnd = new Random(Guid.NewGuid().GetHashCode());
                    int tmp = rnd.Next(0, 100);
                    if (!ht1.ContainsValue(tmp))
                    {
                        ht1.Add(i, tmp);
                        break;
                    }
                }
                while (true);
            }
            Console.WriteLine("===============");
            foreach (var item in ht1.Values)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("===============");

            Console.ReadKey();
        }

    }
}

结果1：

===============
65
90
15
41
66
91
===============
===============
91
97
92
30
90
12
===============

结果2：

===============
25
72
19
66
13
60
===============
===============
70
26
48
16
77
86
===============

结果3：

===============
76
51
26
75
50
24
===============
===============
39
33
28
83
53
50
===============

结果4：

===============
13
88
63
38
12
87
===============
===============
87
92
73
6
88
11
===============

结果5：

===============
29
4
78
53
28
2
===============
===============
64
65
46
35
94
53
===============

结果6：

===============
32
57
83
8
33
59
===============
===============
86
54
38
84
37
58
===============

So! How to get random numbers?