Only return first IP which is IP4

        // This is separate as we need to encapsulate more than FCL offers us
        // It is here so it is reusable by all
        // It only returns the first IP, that is by design. If you want the full
        // list, use the FCL methods directly.
        protected IPAddress ResolveAddress(string aAddress) {
            IPHostEntry xIP = Dns.GetHostEntry(aAddress);
            // Some host names (ie localhost) can return mult entries
            // For now we want the first IP4 one, which is not always in [0]
            return xIP.AddressList.First(x => x.AddressFamily == AddressFamily.InterNetwork);
        }