前面几篇关于arraylist的链接：

本文关于arraylist的代码:using System;

using System.Collections.Generic;

using System.Text;

using System.Collections;//arraylist派生于array类

using System.IO;

namespace ConsoleApplication1

{

class Program

{

public static void Main(string[] args)

{

//string str = "this is one big pig";

//Console.WriteLine(str.Substring(0));

//Console.WriteLine(str.Substring(0,str.Length));

//Console.WriteLine(str.EndsWith("x"));

//Console.WriteLine(str.EndsWith("G",StringComparison.CurrentCultureIgnoreCase));

//Console.WriteLine(str.EndsWith("G", StringComparison.CurrentCulture));

//Console.WriteLine(str.EndsWith("G", StringComparison.InvariantCulture));

//Console.WriteLine(str.EndsWith("G", StringComparison.OrdinalIgnoreCase));

//Console.ReadKey();

ArrayList a1 = new ArrayList();

a1.Add("aaa");

a1.Add(a1);

Single ss = new Single (3);

a1.Add(ss);

Console.WriteLine(a1.Capacity);

Console.WriteLine(a1.Count);

Console.WriteLine(a1[0]);

//如下二句代码只能分开写，不能只写一句console.writeline((Single)a1[2].name)，这样是不成的

//也就是说先把arraylist的元素拆箱转换为泛型类型，然后再用泛型类型的对象的成员进行打印就可以了

Single x = (Single)a1[2];

Console.WriteLine(x.name);

Console.ReadKey();

}