using System;namespace ConsoleApplication3{    class CirculLinkedList    {        //元素个数        private int count;        //尾指针        private Node tail;        //当前节点的前节点        private Node CurrPrev;        //增加元素        public void Add(object value)        {            Node newNode = new Node(value);            if (tail==null)            {//链表为空                tail = newNode;                tail.next = newNode;                CurrPrev = newNode;            }            else            {//链表不为空，把元素增加到链表结尾                newNode.next = tail.next;                tail.next = newNode;                if (CurrPrev==tail)                {                    CurrPrev = newNode;                }                tail = newNode;            }            count++;        }        //删除当前元素        public void RemoveCurrNode()        {            //为null代表为空表            if (tail == null)             {                throw new NullReferenceException("集合中没有任何元素！");            }            else if (count==1)            {                tail = null;                CurrPrev = null;            }            else            {                if (CurrPrev.next==tail)                {                    tail = CurrPrev;                }                CurrPrev.next = CurrPrev.next.next;            }            count--;        }        //当前节点移动步数        public void Move(int step)        {            if (step<0)            {                throw new ArgumentOutOfRangeException("step", "移动步数不可为负数！");            }            if (tail==null)            {                throw new NullReferenceException("链表为空！");            }            for (int i = 0; i < step; i++)            {                CurrPrev = CurrPrev.next;            }        }        //获得当前节点        public object Current        {            get {return CurrPrev.next.item ;}        }        public override string ToString()        {            if (tail==null)            {                return string.Empty;            }            string s = "";            Node temp = tail.next;            for (int i = 0; i < count; i++)            {                s += temp.ToString() + "    ";                temp = temp.next;            }            return s;        }        public int Count        {            get {return count ;}        }        private   class Node        {            public Node(object  value)            {                item = value;            }            //放置数据            public object item;            public CirculLinkedList.Node next;            public override string ToString()            {                return item.ToString();            }        }    }}

using System;namespace ConsoleApplication3{    class Program    {        static void Main(string[] args)        {            CirculLinkedList lst = new CirculLinkedList();            lst.Add(1);            lst.Add(2);            lst.Add(3);            lst.Add(4);            lst.Add(5);            lst.Add(6);            Console.WriteLine(lst.ToString());            Console.WriteLine(lst.Current.ToString());            lst.RemoveCurrNode();            Console.WriteLine(lst.ToString());            lst.Move(2);            Console.WriteLine(lst.Current.ToString());            Console.WriteLine(   lst.ToString());            Console.ReadLine();        }    }}