gistfile1.cs

        static void Main(string[] args)
        {
            string[] ten = new string[] { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
            string[] di = new string[] { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };

            Recursive(ten, di, 0, 0);
        }


        static void Recursive(string[] ten, string[] di, int tenPointer, int diPointer)
        {
            if (tenPointer == ten.Length && diPointer == di.Length)
            {
                return;
            }

            var nextTen = tenPointer % ten.Length;
            var nextDi = diPointer % di.Length;

            JustDoIt(ten[nextTen], di[nextDi]);

            Recursive(ten, di, nextTen + 1, nextDi + 1);
        }

        static void JustDoIt(string ten, string di)
        {
            Console.Write("{0}{1}, ", ten, di);
        }