哈希表
传送门：https://www.cnblogs.com/xpvincent/archive/2013/01/15/2860841.html
using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApp{ ???class Program ???{ ???????static string hashToPostString(Hashtable ht) { ???????????string str = ""; ???????????foreach (DictionaryEntry de in ht) { ???????????????str += de.Key + "=" + de.Value + "&"; ???????????} ???????????return str.Substring(0, str.Length - 1); ???????} ???????static void Main(string[] args) ???????{ ???????????Hashtable ht = new Hashtable(); ???????????ht.Add("username", "13713332652"); ???????????ht.Add("password", "202063sb"); ???????????ht.Add("geetest_challenge", "3c2f03027eb7cac324a7cf67f148441d"); ???????????ht.Add("geetest_validate", "21fa24dfd285b955776fd349c5bc5834"); ???????????ht.Add("geetest_seccode", "21fa24dfd285b955776fd349c5bc5834|jordan"); ???????????????????????string str = hashToPostString(ht); ???????????Console.Write(str); ???????????Console.ReadLine(); ???????} ???}}字典
传送门：http://blog.csdn.net/voodooer/article/details/19233105
using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApp{ ???class Program ???{ ???????static string DictionaryToPostString(Dictionary<string, string> ht) { ???????????string str = ""; ???????????foreach (KeyValuePair<string, string> de in ht) { ???????????????str += de.Key + "=" + de.Value + "&"; ???????????} ???????????return str.Substring(0, str.Length - 1); ???????} ???????static void Main(string[] args) ???????{ ???????????//定义字典 ?????????????Dictionary<string, string> d = new Dictionary<string, string>(); ???????????d.Add("gt", "geetest.gt"); ???????????d.Add("challenge", "geetest.challenge"); ???????????d.Add("model", "3"); ???????????d.Add("referer", "http://www.228.com.cn/auth/login"); ???????????d.Add("return", "json"); ???????????d.Add("user", "dragon8jiyan"); ???????????d.Add("pass", "202063"); ???????????string str = DictionaryToPostString(d); ???????????Console.Write(str); ???????????Console.ReadLine(); ???????} ???}}.net 哈希表和字典的基本用法
原文地址：http://www.cnblogs.com/CyLee/p/7826283.html