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

        public static IPHostEntry Resolve(string hostName)
        {
            if (NetEventSource.IsEnabled) NetEventSource.Enter(null, hostName);

            NameResolutionPal.EnsureSocketsAreInitialized();

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

            // See if it's an IP Address.
            IPAddress address;
            IPHostEntry ipHostEntry;

            if (IPAddress.TryParse(hostName, out address) && (address.AddressFamily != AddressFamily.InterNetworkV6 || SocketProtocolSupportPal.OSSupportsIPv6))
            {
                try
                {
                    ipHostEntry = InternalGetHostByAddress(address, false);
                }
                catch (SocketException ex)
                {
                    if (NetEventSource.IsEnabled) NetEventSource.Error(null, ex);
                    ipHostEntry = NameResolutionUtilities.GetUnresolvedAnswer(address);
                }
            }
            else
            {
                ipHostEntry = InternalGetHostByName(hostName, false);
            }

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