Verifico rete?

using using System.Net.NetworkInformation;

        public static bool CheckHostReachable(string host)
        {
            try
            {
        Ping p = new Ping();
        PingReply pingReply = p.Send(host, 5000);
                return (pingReply.Status == IPStatus.Success);
            }
            catch
            {
                return false;
            }

        }