internal static byte[] ReadRequestResponse(IStreamResource streamResource) {
        // read header
        byte[] mbapHeader = new byte[6];
        int numBytesRead = 0;
        while (numBytesRead != 6) {
            int bRead = streamResource.Read(mbapHeader, numBytesRead, 6 - numBytesRead);
            if (bRead == 0)
                throw new IOException("Read resulted in 0 bytes returned.");
            numBytesRead += bRead;
        }
        Debug.WriteLine("MBAP header: {0}", mbapHeader.Join(", "));

        ushort frameLength = (ushort)IPAddress.HostToNetworkOrder(BitConverter.ToInt16(mbapHeader, 4));
        Debug.WriteLine("{0} bytes in PDU.", frameLength);

        // read message
        byte[] messageFrame = new byte[frameLength];
        numBytesRead = 0;
        while (numBytesRead != frameLength) {
            int bRead = streamResource.Read(messageFrame, numBytesRead, frameLength - numBytesRead);
            if (bRead == 0) throw new IOException("Read resulted in 0 bytes returned.");
            numBytesRead += bRead;
        }
        Debug.WriteLine("PDU: {0}", frameLength);

        byte[] frame = mbapHeader.Concat(messageFrame).ToArray();
        Debug.WriteLine("RX: {0}", frame.Join(", "));

        return frame;
    }