Uri uri = new Uri("http://www.survivalescaperooms.com/"); 
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri); 
req.Method = "POST"; 
req.ContentType = "application/x-www-form-urlencoded"; 
req.ContentLength = 0; 
req.CookieContainer = new CookieContainer(); 
req.GetRequestStream().Write(new byte [0], 0, 0); 
HttpWebResponse res = (HttpWebResponse)(req.GetResponse()); 
StreamReader rs = new StreamReader(res.GetResponseStream(), System.Text.Encoding.GetEncoding("GB18030")); 
string s = rs.ReadToEnd(); 
rs.Close(); 
req.Abort(); 
res.Close(); 
System.Text.RegularExpressions.Match m = System.Text.RegularExpressions.Regex.Match(s, @"ClientIP: /[(?<IP>[0-9/.]*)/]"); 
if (m.Success) IP = m.Groups["IP"].Value;