C#实现Hashtable中 根据键值对的值，然后进行删除这一个键值对

C#实现Hashtable中

根据键值对的值，然后进行删除这一个键值对

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections;   namespace Test1112 {     class Program     {         static void Main(string[] args)         {             Hashtable ht = new Hashtable();             ht.Add("1","张三");             ht.Add("2", "李四");             ht.Add("3", "王五");             ht.Add("4", "小明");                          if(ht.ContainsValue("张三")){                 Console.WriteLine("学生张三已经在集合中了！");             }else{                 ht.Add("5","小刚");             }               ht.Remove("2");               foreach(string key in ht.Keys)             {                 Console.WriteLine(key +":"+ht[key]);                              }             Console.WriteLine("---------------------------------");                           foreach(DictionaryEntry de in ht) //fileht为一个Hashtable实例             {                   //Console.WriteLine("aaaaa  :" + de.Key.GetType());//de.Key对应于keyvalue键值对key,System.String                 //Console.WriteLine("bbbbbbbb   :" + de.Value.GetType());//de.Key对应于keyvalue键值对value,System.String                   string a = de.Value.ToString();                 //Console.WriteLine(a);                 string b = "张三";                 //已经是                 if(a.Equals(b))                 {                     //Console.WriteLine(de.Key.GetType());                     object c = de.Key;//因为ht.Remove(object o)里面只能传入object类型，所以这边进行隐式转换                     ht.Remove(c);                     break;//找到了直接让循环结束                 }               }               //显示结果             Console.WriteLine("--------------------------------");             Console.WriteLine("最后的输出结果为：");             foreach (string key in ht.Keys)             {                 Console.WriteLine(key + ":" + ht[key]);               }               Console.Read();           }     } }