passthru modified

    class Program
    {
        static void Main(string[] args)
        {
            uint adapterIndex = 0;
            IntPtr driverPtr = Ndisapi.OpenFilterDriver();
            List<Packet> packets = new List<Packet>();
            try
            {

                if (Ndisapi.IsDriverLoaded(driverPtr))
                {
                    TCP_AdapterList adapters = new TCP_AdapterList();
                    Ndisapi.GetTcpipBoundAdaptersInfo(driverPtr, ref adapters);

                    ADAPTER_MODE mode = new ADAPTER_MODE
                    {
                        dwFlags = Ndisapi.MSTCP_FLAG_SENT_TUNNEL /*| Ndisapi.MSTCP_FLAG_RECV_TUNNEL*/,
                        hAdapterHandle = adapters.m_nAdapterHandle[adapterIndex]
                    };

                    Ndisapi.SetAdapterMode(driverPtr, ref mode);

                    ManualResetEvent manualResetEvent = new ManualResetEvent(false);
                    Ndisapi.SetPacketEvent(driverPtr, adapters.m_nAdapterHandle[adapterIndex], manualResetEvent.SafeWaitHandle);

                    ETH_REQUEST request = new ETH_REQUEST();
                    INTERMEDIATE_BUFFER buffer = new INTERMEDIATE_BUFFER();
                    IntPtr bufferPtr = Marshal.AllocHGlobal(Marshal.SizeOf(buffer));
                    Win32Api.ZeroMemory(bufferPtr, Marshal.SizeOf(buffer));


                    try
                    {
                        request.hAdapterHandle = adapters.m_nAdapterHandle[adapterIndex];
                        request.EthPacket.Buffer = bufferPtr;

                        while (!Environment.HasShutdownStarted)
                        {
                            manualResetEvent.WaitOne();
                            while (Ndisapi.ReadPacket(driverPtr, ref request))
                            {
                                buffer = (INTERMEDIATE_BUFFER)Marshal.PtrToStructure(bufferPtr, typeof(INTERMEDIATE_BUFFER));

                                if (buffer.m_dwDeviceFlags == Ndisapi.PACKET_FLAG_ON_SEND)
                                {
                                    Ndisapi.SendPacketToAdapter(driverPtr, ref request);

                                    //HERE GOES THE PROCESSING OF PACKET

                                }
                            }
                            manualResetEvent.Reset();
                        }
                    }
                    finally
                    {
                        Marshal.FreeHGlobal(bufferPtr);
                        Ndisapi.CloseFilterDriver(driverPtr);
                    }
                }
            }
            catch(Exception e)
            {
                Console.WriteLine(e.Message);
            }
            Ndisapi.CloseFilterDriver(driverPtr);
        }
    }