大多數集合都在System.Collections，System.Collections.Generic兩個命名空間。其中System.Collections.Generic專門用于泛型集合。針對特定類型的集合類型位于System.Collections.Specialized;命名空間；線程安全的集合類位于System.Collections.Concurrent;命名空間。下面是集合和列表實現的接口如下：一、列表[Serializable][DebuggerTypeProxy(typeof(Mscorlib_CollectionDebugView<>))][DebuggerDisplay("Count = {Count}")]public class List<T> : IList<T>, ICollection<T>, IEnumerable<T>, IList, ICollection, IEnumerable從這個可以看出，泛型集合List<T>實現了這么多接口，具體接口的信息可以通過工具查看。using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){List<String> list = new List<string>();list.Add("張三");list.Add("李四");list.Add("王五");list.Add("田六");list.Add("趙七");for (int i = 0; i < list.Count; i++){Console.WriteLine("for循環：" + i.ToString() + "=" + list[i]);}list.RemoveAt(0);foreach (String item in list){Console.WriteLine("foreach迭代：" + item);}list.AddRange(new String[] { "Hello1", "Hello2", "Hello3" });list.ForEach(Print);Console.Read();}private static void Print(String item){Console.WriteLine("ForEach：" + item);}}}二、隊列隊列先進先出，一頭進一頭出，用Queue<T>實現[Serializable][DebuggerTypeProxy(typeof(System_QueueDebugView<>))][ComVisible(false)][DebuggerDisplay("Count = {Count}")]public class Queue<T> : IEnumerable<T>, ICollection, IEnumerable 可以看出隊列實現了集合的接口，迭代的接口using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){Queue<String> queue = new Queue<string>();//進隊queue.Enqueue("張三");queue.Enqueue("李四");queue.Enqueue("王五");queue.Enqueue("田六");queue.Enqueue("趙七");foreach (String item in queue){Console.WriteLine("foreach迭代：" + item);}//出隊while (queue.Count > 0){Console.WriteLine("出隊：" + queue.Dequeue());}Console.Read();}} }三、棧棧：從同一邊先進后出，用Stack<T>實現[DebuggerDisplay("Count = {Count}")][DebuggerTypeProxy(typeof(System_StackDebugView<>))][ComVisible(false)]public class Stack<T> : IEnumerable<T>, ICollection, IEnumerable棧也是實現了集合接口與迭代接口的using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){Stack<String> stack = new Stack<string>();//進棧stack.Push("張三");stack.Push("李四");stack.Push("王五");stack.Push("田六");stack.Push("趙七");foreach (String item in stack){Console.WriteLine("foreach迭代：" + item);}//出棧while (stack.Count > 0){Console.WriteLine("出棧：" + stack.Pop());}Console.Read();}} }四、鏈表LinkedList是一個雙向鏈表，鏈表有個有點，就是在鏈表中間插入、刪除元素很快，但是查找中間與末尾的元素很慢，需要一個節點一個節點的去找。[Serializable][DebuggerTypeProxy(typeof(System_CollectionDebugView<>))][DebuggerDisplay("Count = {Count}")][ComVisible(false)]public class LinkedList<T> : ICollection<T>, IEnumerable<T>, ICollection, IEnumerable, ISerializable, IDeserializationCallback 由此可見鏈表也是有集合的特性的，可以迭代，同時還有鏈表的特性using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){LinkedList<String> lList = new LinkedList<string>();LinkedListNode<String> node = new LinkedListNode<string>("root");lList.AddFirst(node);node = lList.AddAfter(node, "張三");node = lList.AddAfter(node, "李四");node = lList.AddAfter(node, "王五");node = lList.AddAfter(node, "田六");node = lList.AddAfter(node, "趙七");foreach (String item in lList){Console.WriteLine("foreach迭代：" + item);}node = lList.First;Console.WriteLine("第一個元素：" + node.Value);node = lList.Last;Console.WriteLine("最后一個元素：" + node.Value);Console.Read();}} }五、有序列表SortedList采用鍵-值對存儲，鍵不能重復，并且會根據key進行排序[Serializable][DebuggerTypeProxy(typeof(System_DictionaryDebugView<,>))][DebuggerDisplay("Count = {Count}")][ComVisible(false)]public class SortedList<TKey, TValue> : IDictionary<TKey, TValue>, ICollection<KeyValuePair<TKey, TValue>>, IEnumerable<KeyValuePair<TKey, TValue>>, IDictionary, ICollection, IEnumerable 可以看出SortedList不僅具有字典的特性，還有集合，迭代的功能using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){//Key必須唯一，如果不唯一可以考慮Lookup<TKey,TElement>SortedList<int, String> sList = new SortedList<int, string>();sList.Add(100, "張三");sList.Add(21, "李四");sList.Add(13, "王五");sList.Add(44, "田六");sList.Add(35, "趙七");foreach (KeyValuePair<int, String> item in sList){Console.WriteLine("key=" + item.Key.ToString() + "；value=" + item.Value);}Console.Read();}} }六、字典字典是很復雜的數據結構，允許通過key來查找值，字典可以自由添加、刪除元素，沒有集合由于移動元素導致的開銷。[Serializable][DebuggerTypeProxy(typeof(Mscorlib_DictionaryDebugView<,>))][DebuggerDisplay("Count = {Count}")][ComVisible(false)]public class Dictionary<TKey, TValue> : IDictionary<TKey, TValue>, ICollection<KeyValuePair<TKey, TValue>>, IEnumerable<KeyValuePair<TKey, TValue>>, IDictionary, ICollection, IEnumerable, ISerializable, IDeserializationCallback 可以看出字典也具有集合的特性，可以迭代using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){//Key必須唯一Dictionary<int, String> dict = new Dictionary<int, string>();dict.Add(11, "張三");dict.Add(1, "李四");dict.Add(2, "王五");dict.Add(16, "田六");dict.Add(12, "趙七");foreach (KeyValuePair<int, String> item in dict){Console.WriteLine("key=" + item.Key.ToString() + "；value=" + item.Value);}Console.Read();}} }說到字典，順便談一下有序字典，與有序列表對應；SortedDictionary，SortedList，SortedSet會根據Key進行排序using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){//Key必須唯一SortedDictionary<int, String> dict = new SortedDictionary<int, string>();dict.Add(11, "張三");dict.Add(1, "李四");dict.Add(2, "王五");dict.Add(16, "田六");dict.Add(12, "趙七");foreach (KeyValuePair<int, String> item in dict){Console.WriteLine("key=" + item.Key.ToString() + "；value=" + item.Value);}Console.Read();}} }七、集集(Set)：包含不重復元素，常用HashSet，SortedSet[Serializable][DebuggerDisplay("Count = {Count}")][DebuggerTypeProxy(typeof(HashSetDebugView<>))]public class HashSet<T> : ISerializable, IDeserializationCallback, ISet<T>, ICollection<T>, IEnumerable<T>, IEnumerable[Serializable][DebuggerTypeProxy(typeof(SortedSetDebugView<>))][DebuggerDisplay("Count = {Count}")]public class SortedSet<T> : ISet<T>, ICollection<T>, IEnumerable<T>, ICollection, IEnumerable, ISerializable, IDeserializationCallbackusing System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){HashSet<String> hSet = new HashSet<string>();hSet.Add("張三");hSet.Add("李四");hSet.Add("王五");hSet.Add("田六");hSet.Add("趙七");foreach (String item in hSet){Console.WriteLine("foreach迭代：" + item);}Console.Read();}} }using System; using System.Collections.Generic;namespace ConsoleApplication1 {public class Program{static void Main(string[] args){SortedSet<String> hSet = new SortedSet<string>();hSet.Add("張三");hSet.Add("李四");hSet.Add("王五");hSet.Add("田六");hSet.Add("趙七");foreach (String item in hSet){Console.WriteLine("foreach迭代：" + item);}Console.Read();}} }

　　

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轉載于:https://www.cnblogs.com/youngharvard/p/10491004.html

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