int status = 0; //set your status

                    netStream.Write(BitConverter.GetBytes(status), 0x0, sizeof(int));
                    if (status > 0) {
                        netStream.Write(!!!YOUR MAGIC BUFFER HERE!!!, 0, 0xE0);
                        Console.WriteLine("Challenge has been sent with success!");
                    }else{
                        Console.WriteLine("Challenge failed! sending client an error status");
                    }