我用C#写的查询电脑连接外网IP，我看大家基本都是调用这个网址查的http://www.ip138.com/，不过我一查就是查的连接服务器的IP，也有用这个网址的http://www.3322.org/dyndns/getip，该怎么解决，我现在用的这个

#region 外网IP
private static string GetIP()
{
string SourceCode = "";
try
{
WebClient wc = new WebClient();
wc.Credentials = CredentialCache.DefaultCredentials;
byte[] pageData = wc.DownloadData("http://www.3322.org/dyndns/getip");
SourceCode = Encoding.UTF8.GetString(pageData);
wc.Dispose();
}
catch (Exception x)
{
throw new Exception("获取异常，" + x.Message);
}

Match rebool = Regex.Match(SourceCode, @"\d{2,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}");
string value = rebool.Value;
return value;
}
#endregion