System.Net.DnsEndPoint.DnsEndPoint C# (CSharp) Method

        public DnsEndPoint(string host, int port, AddressFamily addressFamily)
        {
            if (host == null)
            {
                throw new ArgumentNullException(nameof(host));
            }

            if (String.IsNullOrEmpty(host))
            {
                throw new ArgumentException(SR.Format(SR.net_emptystringcall, nameof(host)));
            }

            if (port < IPEndPoint.MinPort || port > IPEndPoint.MaxPort)
            {
                throw new ArgumentOutOfRangeException(nameof(port));
            }

            if (addressFamily != AddressFamily.InterNetwork &&
                addressFamily != AddressFamily.InterNetworkV6 &&
                addressFamily != AddressFamily.Unspecified)
            {
                throw new ArgumentException(SR.net_sockets_invalid_optionValue_all, nameof(addressFamily));
            }

            _host = host;
            _port = port;
            _family = addressFamily;
        }