C#实现自动识别URL网址的方法

using System;using System.Collections.Generic;using System.Text;using System.Net;using System.Text.RegularExpressions;namespace ConsoleApplication3{ class Program {  static void Main(string[] args)  {   string s = "例如：http://www.asd.com";   Regex re = new Regex(@"(?<url>http(s)?://([/w-]+/.)+[/w-]+(/[/w- ./?%&=]*)?)");   MatchCollection mc = re.Matches(s);   foreach (Match m in mc)   {    s=s.Replace(m.Result("${url}"), String.Format("<a href='{0}'>{0}</a>", m.Result("${url}")));   }   Console.WriteLine(s);  } }}