using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace HashTableTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Hashtable ht = new Hashtable();
            //添加元素
            ht.Add(1,"jack");
            ht.Add(2,"tom");
            ht[3] = "join";
            //用此种方式添加元素应该注意：
            //如果对应的键key存在，重新赋值
            //如果不存在，则增加对应的键值对
            ht[1] = "mach";
            ht[4]="marry";
             
            //数组长度：length
            //集合个数：count
            Console.WriteLine(ht.Count);
            //遍历集合的两种方式：
            foreach (DictionaryEntry obj in ht)
            {
                Console.WriteLine("{0} - {1}",obj.Key,obj.Value);
            }
            Console.WriteLine("======================");
            foreach (object obj in ht.Keys)
            {
                Console.WriteLine("{0} - {1}",obj,ht[obj]);
            }
                Console.ReadKey();
        }
    }
}