33选6

            while (true)
            {
                Console.WriteLine("请输入你预测的中奖号码：");
                int sum = 0;
                int a1 = int.Parse(Console.ReadLine());
                int a2 = int.Parse(Console.ReadLine());
                int a3 = int.Parse(Console.ReadLine());
                int a4 = int.Parse(Console.ReadLine());
                int a5 = int.Parse(Console.ReadLine());
                int a6 = int.Parse(Console.ReadLine());
                Console.Write("\n");

                int[] arr = new int[6];

                for (int i = 0; i < 6; i++)
                {
                    Random r = new Random();
                    arr[i] = r.Next(1, 33);
                    #region==判断是否相等，相等跳出重来==
                    for (int j = 0; j < i; j++)
                    {
                        if (arr[j] == arr[i])
                        {
                            i--;
                            break;

                        }

                    }
                    #endregion
                }

                foreach (int a in arr)
                {
                    Console.WriteLine(a);
                    if (a1 == a) sum += 1;
                    if (a2 == a) sum += 1;
                    if (a3 == a) sum += 1;
                    if (a4 == a) sum += 1;
                    if (a5 == a) sum += 1;
                    if (a6 == a) sum += 1;
                }
                if (sum == 0) Console.WriteLine("你猜中了0个数,未中奖");
                if (sum == 1) Console.WriteLine("你猜中了1个数,未中奖");
                if (sum == 2) Console.WriteLine("你猜中了2个数,恭喜获得五等奖，奖金5元");
                if (sum == 3) Console.WriteLine("你猜中了3个数,恭喜获得四等奖，奖金200元");
                if (sum == 4) Console.WriteLine("你猜中了4个数,恭喜获得三等奖，奖金3000元");
                if (sum == 5) Console.WriteLine("你猜中了5个数,恭喜获得二等奖，奖金250000元");
                if (sum == 6) Console.WriteLine("你猜中了6个数,恭喜获得一等奖，奖金5000000元");
                Console.Write("");
                Console.ReadLine();
            }