程序代码：

            int[] number = new int[100];
            Random r = new Random();                        //用来生成随机数
            int max = 0;
            int min = 1000;
            int sum = 0;
            int doubleNumber = 0;
            for (int i = 0; i < number.Length; i++)
            {
                number[i] = r.Next(1000);                   //生成1000之内的随机数
                max = max > number[i] ? max : number[i];    //得到最大值
                min = min < number[i] ? min : number[i];    //得到最小值
                sum += number[i];
                if (number[i] % 2 == 0)
                    doubleNumber++;
                Console.Write(number[i] + "  ");            //输出
            }
            Console.WriteLine("\n最大值是：" + max); ;
            Console.WriteLine("最小值是：" + min);
            Console.WriteLine("偶数个数为：" + doubleNumber);
            Console.WriteLine("平均数是：" + (double)sum / number.Length);