public class Solutionl_Sum

    {

        //声明长度为N的数组

        public static int[] Temps1 = new int[100];

        public void Print_Sum()

        {

            N = 0;

            //temp = new Temp();

            //Temp2();

            Temp4();

            Console.WriteLine(Sum);

        }



        public static  int Sum { get; set; }

        public static  int N { get; set; }



        #region 递归实现的循环

        

        public void Temp4()

        {

            ++N;            //++N 相当于每次执行都加1

            Sum += N;       //相当于1+2+...+N

            try

            {

                Temps1[N - 1] = N;          //将N放到数组中,当N-1>100是报错,停止循环

                Temp4();                    //递归循环

            }

            catch (Exception)               //利用try..catch结束循环

            {

                Sum -= N;                   //由于先执行的是Sum += N,所以相当于多加了一次N,结束时一定要减去N

            }

        }



        #endregion



        #region 两个方法实现的循环

        

        public void Temp2()

        {

            ++N;        //++N 相当于每次执行都加1

        &