Domain Query in C#

DnsQuery.cs

public static IPEndPoint QueryDns(string domain, short port)
{
    var domainAddresses = Dns.GetHostEntry(domain).AddressList;

    foreach (var addr in domainAddresses)
    {
        if (addr.AddressFamily == AddressFamily.InterNetwork)
        {
            return new IPEndPoint(addr, port);
        }
    }

    foreach (var addr in domainAddresses)
    {
        if (addr.AddressFamily == AddressFamily.InterNetworkV6)
        {
            return new IPEndPoint(addr, port);
        }
    }

    return null;
}