Winform中如何读取局域网路由的IP地址

 

 System.Net.WebClient();
            client.Encoding = System.Text.Encoding.Default;
             string lip = client.DownloadString("http://www.ip138.com/ip2city.asp");
          string sip = reply.Substring(reply.IndexOf("您的IP地址是"), reply.IndexOf("</center>") - reply.IndexOf("您的IP地址是"));
            MessageBox.Show(sip);