public void ListAllContacts() { string code = Request.QueryString["code"]; string google_client_id = ConfigurationManager.AppSettings["google_client_id"].ToString(); string google_client_sceret = ConfigurationManager.AppSettings["google_client_sceret"].ToString(); string google_redirect_url = ConfigurationManager.AppSettings["google_redirect_url"].ToString(); /*Get Access Token and Refresh Token*/ GoogleContactService objService = new GoogleContactService(); GooglePlusAccessToken serStatus = objService.getAccessToken(code, google_client_id, google_client_sceret, google_redirect_url); /*End*/ List <ContactDetail> contactDetails = objService.GetContacts(serStatus); BindDataToDrid(contactDetails); }