using System;using System.Collections.Generic;namespace ConsoleApplication{    class Program    {        static void Main(string[] args)        {            Dictionary
     
       a = new Dictionary
      
       ();            a.Add("xiaoming", 10);            a["xiaozhang"] = 11;            a.Add("xiaoli", 12);            foreach (KeyValuePair
       
         i in a)            {                Console.Write(i.Key + ":" + i.Value);                Console.WriteLine();            }            Console.WriteLine();            a.Remove("xiaoming");            foreach (KeyValuePair
        
          i in a)            {                Console.Write(i.Key + ":" + i.Value);                Console.WriteLine();            }            a.ContainsKey("xiaoli");    //返回bool            a.ContainsValue(11);        //返回bool            int s = a["xiaozhang"];            Console.Write(s);            Console.Read();        }          }}