System.Net.Dns.GetHostByAddress C# (CSharp) Метод

        public static IPHostEntry GetHostByAddress(IPAddress address)
        {
            if (NetEventSource.IsEnabled) NetEventSource.Enter(null, address);
            NameResolutionPal.EnsureSocketsAreInitialized();

            if (address == null)
            {
                throw new ArgumentNullException(nameof(address));
            }

            IPHostEntry ipHostEntry = InternalGetHostByAddress(address, false);

            if (NetEventSource.IsEnabled) NetEventSource.Exit(null, ipHostEntry);
            return ipHostEntry;
        } // GetHostByAddress
        

        public static IPHostEntry Resolve(string hostName)
        {
            if (hostName == null)
            {
                throw new ArgumentNullException("hostName");
            }
            IPHostEntry iphostEntry = null;

            try
            {
                iphostEntry = Dns.GetHostByAddress(hostName);
            }
            catch
            {
            }
            if (iphostEntry == null)
            {
                iphostEntry = Dns.GetHostByName(hostName);
            }
            return(iphostEntry);
        }