class ServicePinger     {         private static readonly ILog log = LogManager.GetLogger(typeof(ServicePinger));         public ServicePinger(string siteName, string siteUrl, string serviceUrl)         {             if (siteName == null)                 throw new ArgumentException("siteName can't be null");             if (siteUrl == null)                 throw new ArgumentException("siteUrl can't be null");             if (serviceUrl == null)                 throw new ArgumentException("serviceUrl can't be null");             if (siteName.Length == 0)                 throw new ArgumentException("siteName can't be empty");             if (siteUrl.Length == 0)                 throw new ArgumentException("siteUrl can't be empty");             if (serviceUrl.Length == 0)                 throw new ArgumentException("serviceUrl can't be empty");             pingingSiteName = siteName;             pingingSiteUrl = siteUrl;             serviceUrlToPing = serviceUrl;           }         private string pingingSiteName = string.Empty;         private string pingingSiteUrl = string.Empty;         private string serviceUrlToPing = string.Empty;         private int timeoutInMilliseconds = 3000;           /// <summary>         /// Does the actual pinging of the service         /// </summary>         public void Ping()         {             try             {                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceUrlToPing);                 request.Method = "POST";                 request.ContentType = "text/xml";                 request.Timeout = timeoutInMilliseconds;                 request.Credentials = CredentialCache.DefaultNetworkCredentials;                   Stream stream = (Stream)request.GetRequestStream();                 using (XmlTextWriter writer = new XmlTextWriter(stream, Encoding.ASCII))                 {                     writer.WriteStartDocument();                     writer.WriteStartElement("methodCall");                     writer.WriteElementString("methodName", "weblogUpdates.ping");                     writer.WriteStartElement("params");                     writer.WriteStartElement("param");                     writer.WriteElementString("value", pingingSiteName);                     writer.WriteEndElement();                     writer.WriteStartElement("param");                     writer.WriteElementString("value", pingingSiteUrl);                     writer.WriteEndElement();                     writer.WriteEndElement();                     writer.WriteEndElement();                 }                   request.GetResponse();             }             catch (InvalidOperationException ex)             {                 log.Error(ex);             }             catch (NotSupportedException ex)             {                 log.Error(ex);             }         }     }