实现代码原理如下： 1、继承一个CollectionBase抽象类,该类又继承IList, ICollection, IEnumerable接口。而该抽象类提供一套的抽象方法并且提供数据结构InnerList(ArrayList)来定制自己的集合类。后续文章会介绍一下ArrayList这个数据结构。 2、实现代码如下：  using System;using System.Collections.Generic;using System.Collections;using System.Text; namespace DataStructureConsoleApplication{    class CollectionProgram:CollectionBase    {       //implementing the Add Method using the ArrayList         public void Add(object item)        {            InnerList.Add(item);        }        //implementing the Remove Method using the ArrayList         public void Remove(object item)        {            InnerList.Remove(item);        }        //implementing the Insert Method using the ArrayList         public void Insert(int index,object item)        {            InnerList.Insert(index, item);        }        //implementing the Contains Method using the ArrayList         public bool Contains(object item)        {          return  InnerList.Contains(item);        }        //implementing the IndexOf Method using the ArrayList         public int IndexOf(object item)        {            return InnerList.IndexOf(item);        }        //implementing the RemoveAt Method using the ArrayList         public void RemoveAt(int index)        {            InnerList.RemoveAt(index);        }        //hide the method         public new void Clear()        {            InnerList.Clear();        }        //hide the property        public new int count        {            get            {                return InnerList.Count;            }        }                    }    class CollectionProgram1    {               static void Main(string[] args)        {            CollectionProgram cps = new CollectionProgram();            cps.Add("goal");            cps.Add("bell");            cps.Add("love");            cps.Add("city");            cps.Add("Zhaoqing");            foreach (object cp in cps)            {                Console.WriteLine(cp);            }            Console.WriteLine("Number of cps:"+cps.count);            cps.Remove("city");            Console.WriteLine("Number of cps:" + cps.count);            cps.Insert(3,"city");            Console.WriteLine("Number of cps:" + cps.count);                        Console.WriteLine("Index of Number:" + cps.IndexOf("love"));            cps.RemoveAt(2);            Console.WriteLine("Index of Number:" + cps.IndexOf("love"));            Console.WriteLine("Number of cps:" + cps.count);            if (cps.Contains("Zhaoqing"))            {                Console.WriteLine("Right!");            }            else            {                Console.WriteLine("Wrong!");            }            cps.Clear();            Console.WriteLine("Number of cps:" + cps.count);        }    }} 运行结果： goal bell love city Zhaoqing Number of cps:5 Number of cps:4 Number of cps:5 Number of cps:2 Number of cps:-1 Number of cps:4 Right! Number of cps:0 希望大家来拍砖哦！：）

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