本例子实现了如何自定义线性节点集合，具体代码如下：

using System;using System.Collections;using System.Collections.Generic;namespace LineNodeDemo{ class Program { static void Main(string[] args) { LineNodeCollection lineNodes = new LineNodeCollection(); lineNodes.Add(new LineNode("N1") { Name = "Microsoft" }); lineNodes.Add(new LineNode("N2") { Name = "Lenovo" }); lineNodes.Add(new LineNode("N3") { Name = "Apple" }); lineNodes.Add(new LineNode("N4") { Name = "China Mobile" }); Console.WriteLine("1、显示全部："); lineNodes.ForEach(x => { Console.WriteLine(x.Name); }); Console.WriteLine("2、删除编号为N2的元素："); lineNodes.Remove("N2"); lineNodes.ForEach(x => { Console.WriteLine(x.Name); }); Console.WriteLine("3、删除索引为1的元素："); lineNodes.RemoveAt(1); lineNodes.ForEach(x => { Console.WriteLine(x.Name); }); Console.WriteLine("4、显示索引为0元素的名称："); Console.WriteLine(lineNodes[0].Name); Console.WriteLine("5、显示编号为N4元素的名称："); Console.WriteLine(lineNodes["N4"].Name); Console.WriteLine("6、清空"); lineNodes.Clear(); lineNodes.ForEach(x => { Console.WriteLine(x.Name); }); Console.ReadKey(); } } static class Utility { public static void ForEach<T>(this IEnumerable<T> source, Action<T> action) { foreach(var r in source) { action(r); } } } class LineNodeCollection : IEnumerable<LineNode> { public IEnumerator<LineNode> GetEnumerator() { return new LineNodeEnumerator(this.firstLineNode); } IEnumerator IEnumerable.GetEnumerator() { return this.GetEnumerator(); } public LineNode this[int index] { get { LineNode _lineNode= this.firstLineNode; for (int i=0;i<=index;i++) { if (_lineNode != null) { if(i<index) { _lineNode = _lineNode.Next; continue; } else { return _lineNode; } } else break; } throw new IndexOutOfRangeException("超出集合索引范围"); } } public LineNode this[string id] { get { LineNode _lineNode = this.firstLineNode; for (int i = 0; i < this.Count; i++) { if(_lineNode.ID == id) { return _lineNode; } else { _lineNode = _lineNode.Next; } } throw new IndexOutOfRangeException("未能在集合中找到该元素"); } } LineNode firstLineNode; LineNode lastLineNode; public void Add(LineNode lineNode) { this.Count++; if(this.firstLineNode == null) { this.firstLineNode = lineNode; } else { if (this.firstLineNode.Next == null) { lineNode.Previous = this.firstLineNode; this.firstLineNode.Next = lineNode; this.lastLineNode = this.firstLineNode.Next; } else { lineNode.Previous = this.lastLineNode; this.lastLineNode.Next = lineNode; this.lastLineNode = this.lastLineNode.Next; } } } public int Count { private set;get; } public int IndexOf(string id) { LineNode _lineNode = this.firstLineNode; for (int i = 0; i < this.Count; i++) { if (_lineNode.ID == id) { return i; } else { _lineNode = _lineNode.Next; } } throw new IndexOutOfRangeException("未能在集合中找到该元素"); } public void Clear() { this.firstLineNode = null; this.lastLineNode = null; this.Count = 0; this.GetEnumerator().Reset(); } public void RemoveAt(int index) { if (this.Count < index) throw new InvalidOperationException("超出集合索引范围"); LineNode _currentLineNode = this[index]; if (_currentLineNode.Previous == null) { _currentLineNode = _currentLineNode.Next; this.firstLineNode = _currentLineNode; } else { LineNode _lineNode = this.firstLineNode; for (int i = 0; i <= index - 1; i++) { if (i < index - 1) { _lineNode = _lineNode.Next; continue; } if (i == index - 1) { if (_currentLineNode.Next != null) { _lineNode.Next = _lineNode.Next.Next; } else { this.lastLineNode = _lineNode; _lineNode.Next = null; } break; } } } this.Count--; } public void Remove(string id) { int _index = this.IndexOf(id); this.RemoveAt(_index); } public LineNode TopLineNode { get { return this.firstLineNode; } } public LineNode LastLineNode { get { return this.lastLineNode; } } } class LineNodeEnumerator : IEnumerator<LineNode> { LineNode topLineNode; public LineNodeEnumerator(LineNode topLineNode) { this.topLineNode = topLineNode; } public LineNode Current { get { return this.lineNode; } } object IEnumerator.Current { get { return this.Current; } } public void Dispose() { this.lineNode = null; } LineNode lineNode; public bool MoveNext() { if(this.lineNode == null) { this.lineNode = this.topLineNode; if (this.lineNode == null) return false; if (this.lineNode.Next == null) return false; else return true; } else { if(this.lineNode.Next !=null) { this.lineNode = this.lineNode.Next; return true; } return false; } } public void Reset() { this.lineNode = null; } } class LineNode { public LineNode(string id) { this.ID = id; } public string ID { private set; get; } public string Name {set; get; } public LineNode Next { set; get; } public LineNode Previous { set; get; } }}

注意：

①这里所谓的线性节点指定是每个节点之间通过关联前后节点，从而形成链接的节点；

②本示例完全由博主原创，转载请注明来处。

运行结果如下：

示例下载地址：C#自定义线性节点链表集合

（请使用VS2015打开，如果为其他版本，请将Program.cs中的内容复制到自己创建的控制台程序中）

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