概述

Hashtable用来存储键值对数据。

  • Add() 添加元素
  • Remove() 移除元素
  • Count 键值对个数
  • Keys 键值集合

示例

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Hashtable ht = new Hashtable();
            ht.Add(0, "c");
            ht.Add(1, "c#");
            ht.Add(2, "php");
            ht.Add(3, "java");
            ht.Add(4, "java");
            ht[5] = "rust";
            ht.Remove(0);
            Console.WriteLine("ht键值对个数:{0}",ht.Count);
            if (ht.Contains(1))
            {
                Console.WriteLine("Contains");
            }
            foreach (var item in ht.Keys)
            {
                Console.WriteLine(ht[item]);
            }
        }
    }
}