public static string CheckTeamSiteUrl(string url)  {          string response = "";          HttpWebResponse httpResponse = null;            //assert: user have access to URL           try          {              HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(url);              httpRequest.Headers.Set("Pragma", "no-cache");                    // request.Headers.Set("KeepAlive", "true");                    httpRequest.CookieContainer = new CookieContainer();                        httpRequest.Referer = url;                    httpRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";                                  httpRequest.Credentials = System.Net.CredentialCache.DefaultCredentials;              httpResponse = (HttpWebResponse)httpRequest.GetResponse();                        }          catch (Exception ex)          {              throw new ApplicationException("HTTP 403 Access denied, URL: " + url, ex);          }            //if here, the URL is correct and the user has access           try          {              string strEncod = httpResponse.ContentType;              StreamReader stream;              if (strEncod.ToLower().IndexOf("utf") != -1)              {                  stream = new StreamReader(httpResponse.GetResponseStream(), System.Text.Encoding.UTF8);              }              else              {                  stream = new StreamReader(httpResponse.GetResponseStream(), System.Text.Encoding.Default);              }                           char[] buff = new char[4000];              stream.ReadBlock(buff,0,4000);              response = new string(buff);              stream.Close();              httpResponse.Close();          }          catch (Exception ex)          {              throw new ApplicationException("HTTP 404 Page not found, URL: " + url, ex);          }          return response;  }

public static string getPage(String url)  {         WebResponse result = null;          string resultstring = "";          try          {              WebRequest req = WebRequest.Create(url);              req.Timeout = 30000;              result = req.GetResponse();              Stream ReceiveStream = result.GetResponseStream();                //read the stream into a string              //StreamReader sr = new StreamReader(ReceiveStream, System.Text.Encoding.UTF8);              string strEncod = result.ContentType;              StreamReader sr;              if (strEncod.ToLower().IndexOf("utf") != -1)              {                  sr = new StreamReader(ReceiveStream, System.Text.Encoding.UTF8);              }              else              {                  sr = new StreamReader(ReceiveStream, System.Text.Encoding.Default);              }              resultstring = sr.ReadToEnd();              js.alert(resultstring);              //Console.WriteLine(resultstring);          }          catch          {              throw new Exception();          }          finally          {              if (result != null)              {                  result.Close();              }          }          return resultstring;  }

public string get(int length)  {          try          {              getEncodeing();              WebClient wb = new WebClient();              Stream response = wb.OpenRead(url);              StreamReader reader = new StreamReader(response, this.encoding, true, 256000);              char[] a = new char[length];              int i  = reader.Read(a,0,length);              reader.Close();              return new string(a);          }          catch (Exception e)          {              return e.Message;              //return null;          }  }  private void getEncodeing()  {         switch (this.encode)          {              case "UTF-8": encoding = Encoding.UTF8; break;              case "GB2312": encoding = Encoding.GetEncoding("GB2312"); break;              case "ASCII": encoding = Encoding.ASCII; break;              default: encoding = Encoding.GetEncoding(encode); break;          }  }