C#随机3个不重复的1-12之间的数

Question

如题，我只知道怎样随机一个数

Answer 1

            int[] ary = Enumerable.Range(1, 12).OrderBy(t => Guid.NewGuid()).Take(3).ToArray();

Answer 2

http://www.cnblogs.com/jxsoft/archive/2011/03/15/1984509.html

Answer 3

 Random rnd = new Random();
            int[] res = new int[3];
            int i = 0;
            while (i < 3)
            {
                res[i] = rnd.Next(1, 12); //如果你取的范围包含12，则把(1,12)改成(1,13)
                if (!res.Take(i).Contains(res[i]))
                    i++;
            }