C#使用foreach循环后就报错system.int32

Question

**
在练习题目的时候遇到了一个问题,将用户输入的n个数据排序后并打印出来,在最后一步将排序好的数据打印出来,用foreach循环就会报错system.in32,我换成for循环遍历整个数组打印就是正常的,这是为啥呢?望指点,以下是代码:**

 Console.WriteLine("请输入数字:");
            int input = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("你需要输入{0}个年龄:", input);
            int[] num = new int[input];
            for (int i = 0; i < num.Length; i++)
            {
                Console.WriteLine("请输入第{0}个年龄", i + 1);
                int a = Convert.ToInt32(Console.ReadLine());
                num[i] = a;
            }
            Console.WriteLine("原数据为:");
            for (int i = 0; i < num.Length; i++)
            {
                Console.Write(num[i] + " ");
            }
            Console.WriteLine();
            Console.WriteLine("排序后的顺序是:");
            for (int i = 0; i < num.Length; i++)
            {
                for (int j = 0; j < num.Length - i - 1; j++)
                {
                    if (num[j] < num[j + 1])
                    {
                        int temp = num[j];
                        num[j] = num[j + 1];
                        num[j + 1] = temp;
                    }
                }
            }
            //for (int i = 0; i < num.Length; i++)
            //{
            //    Console.Write(num[i] + " ");
            //}
            foreach (var item in num)
            {
                Console.WriteLine(num);
            }

Answer 1

Console.WriteLine(num);这行应该是item不是num