.net获取本机公网IP代码

类的代码如下：

 using System;
 using System.Net;
 using System.Text.RegularExpressions;

 namespace Keleyi.Com
 {
     public class GetInternetIP
     {
         public static string GetIP()
         {
             using (var webClient = new WebClient())
             {
                 try
                 {
                     var temp = webClient.DownloadString("http://iframe.ip138.com/ic.asp");
                     var ip = Regex.Match(temp, @"\[(?<ip>\d+\.\d+\.\d+\.\d+)]").Groups["ip"].Value;
                     return !string.IsNullOrEmpty(ip) ? ip : null;
                 }
                 catch (Exception ex)
                 {
                     return ex.Message;
                 }
             }
         }
     }
 }

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