C#單鏈表

using System;using System.Collections.Generic;using System.Text;namespace bishi{    public class Node    {        public object element;        public Node link;        public Node()        {            element = null;            link = null;        }        public Node(object item)        {            element = item;            this.link = null;        }    }    public class LinkList    {        public Node head;        public LinkList Next;        public LinkList()        {            head = new Node("header");        }        public  Node findNode(object item)        {            Node current = new Node();            current=head;            while (current.element != item)            {                current = current.link;            }            return current;        }        public void insertNode(object item,object after)        {            Node current = new Node();            Node newNode=new Node(item);            current = findNode(after);            if (current != null)            {                newNode.link = current.link;                current.link = newNode;            }        }       public  void Del(object item)        {            Node current = new Node();            current = findPre(item);            Node pre = new Node();          //  Node after = new Node();            if (current != null)                current.link = current.link.link;        }        public Node findPre(object item)        {            Node current = head;            while (!(current.link.element != item) && (current.link != null))            {                current = current.link;            }            return current;        }        public void PrintList()        {            Node current = new Node();            current = this.head;            while (current != null)            {                Console.WriteLine(current.element);                current = current.link;            }        }    }    class pro    {        static void Main(string[] args)        {            Node firstNode = new Node("firstNode");            Node secNode = new Node("secNode");            Node thiNode = new Node("11");            firstNode.link = secNode;            secNode.link = thiNode;            thiNode.link = null;            LinkList myList = new LinkList();            myList.head.link = firstNode;            myList.PrintList();            myList.insertNode("hanwujibaby","firstNode");            myList.PrintList();            myList.Del("hanwujibaby");            myList.PrintList();            System.Threading.Thread.Sleep(8000);        }    }   }