EndPoint packetSender = (EndPoint) new IPEndPoint(IPAddress.Any, 0);
byte[] buf = new byte[2048];

while ( state != State.Disconnected )
{
    try
    {
        if ( !sock.Poll(150000, SelectMode.SelectRead) && DateTime.Now > timeOut )
        {
            DebugLog.WriteLine("UdpConnection", "Connection timed out");
            state = State.Disconnected;
            break;
        }

        while ( sock.Poll(10000, SelectMode.SelectRead) )
        {
            int length = sock.ReceiveFrom(buf, ref packetSender);

            if ( !packetSender.Equals(remoteEndPoint) )
                continue;

            timeOut = DateTime.Now.AddSeconds(TIMEOUT_DELAY);

            MemoryStream ms = new MemoryStream(buf, 0, length);
            UdpPacket packet = new UdpPacket(ms);

            ReceivePacket(packet);
        }
    }
    catch ( SocketException e )
    {
        DebugLog.WriteLine("UdpConnection", "Critical socket failure: " + e.ErrorCode);
        state = State.Disconnected;
        break;
    }
    if ( state != State.Disconnected )
        SendPendingMessages();

    if ( inSeq != inSeqAcked )
        SendAck();

    if ( state == EState.Disconnecting && outPackets.Count == 0 )
    {
        DebugLog.WriteLine("UdpConnection", "Graceful disconnect completed");
        state = State.Disconnected;
    }
}

DebugLog.WriteLine("UdpConnection", "Calling OnDisconnected");
OnDisconnected(EventArgs.Empty);

select.select([sock], [], [], x)[0]

sock.Poll(x, SelectMode.SelectRead)