C # obtain the page source code

///   <Summary>          ///  ObtainSource code  ///   </Summary>          ///   <Param name = "url"> </param>          ///   <Param name = "encoding"> </param>          ///   <Returns> </returns>          Public   String Getpage (String URL, String  Pointstr, encoding EC {httpwebrequest request = Null  ; Httpwebresponse webresponse = Null  ;  Try  {Request = (Httpwebrequest) webrequest. Create (URL); Request. allowautoredirect = True  ; Request. Timeout = 5000  ; Request. readwritetimeout = 5000  ;  //  Request. keepalive = true; Request. method = "  Get  "  ;  //  Request. impersonationlevel = system. Security. Principal. tokenimpersonationlevel. Anonymous; Request. useragent ="  Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)  "  ; Webresponse = (Httpwebresponse) request. getresponse ();  Using (System. Io. Stream stream = Webresponse. getresponsestream ()){  Using (System. Io. streamreader reader2 = New  Streamreader (stream, EC )){  Return Reader2.readtoend ();}}}  Catch  {  //  Main. St. Add (URL + "----" + ex. tostring ());                  Return   ""  ;}  Finally  {  If (Request! = Null  ) {Request =Null  ;}  If (Webresponse! = Null  ) {Webresponse. Close (); webresponse = Null  ;}}}