C#与数据结构

    并在Main方法中输入如下代码：

    using System;
    using LinearList;

    namespace Demo2_1
    {
        class Program
        {
            static void Main(string[] args)
            {
                ArrayList arr = new ArrayList();
                Console.WriteLine("arr现在的容量为：" + arr.Capacity + "  长度为:" + arr.Count);
                arr.Add(1); //添加一个元素
                Console.WriteLine("arr现在的容量为：" + arr.Capacity + "  长度为:" + arr.Count);
                for (int i = 2; i <= 5; i++)
                {   //添加4个元素，完成后元素总数达到5个
                    arr.Add(i);
                }
                Console.WriteLine("arr现在的容量为：" + arr.Capacity + "  长度为:" + arr.Count);
                for (int i = 6; i <= 9; i++)
                {   //添加4个元素，完成后元素总数达到9个
                    arr.Add(i);
                }
                Console.WriteLine("arr现在的容量为：" + arr.Capacity + "  长度为:" + arr.Count);
                for (int i = 0; i < arr.Count; i++) //打印所有元素
                {
                    Console.Write(i + "  ");
                }
                //删除两个元素
                arr.RemoveAt(arr.Count - 1);
                arr.RemoveAt(arr.Count - 1);
                Console.WriteLine(); //换行
                for (int i = 0; i < arr.Count; i++) //打印所有元素
                {
                    Console.Write(i + "  ");
                }
                Console.WriteLine(); //换行
                Console.WriteLine("arr现在的容量为：" + arr.Capacity + "  长度为:" + arr.Count);
                arr.TrimToSize(); //载减多余空间
                Console.WriteLine("arr现在的容量为：" + arr.Capacity + "  长度为:" + arr.Count);
                Console.ReadLine();
            }
        }
    }