.net实现ping的实例代码

代码如下:
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
            {