换ip

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://localhost/ip.aspx"); 

request.Headers.Add("X_FORWARDED_FOR", "0.0.0.0"); 

HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 

StreamReader stream = new StreamReader(response.GetResponseStream()); 

string IP = stream.ReadToEnd(); 

stream.Close(); 

response.Close(); 

request = null;