Untitled

    class Program
    {
        static void Main(string[] args)
        {
            SerialPort port = new SerialPort("COM9");
            try
            {
                port.BaudRate = 57600;
                port.DataBits = 8;
                port.StopBits = StopBits.One;
                port.Parity = Parity.None;
                port.Handshake = Handshake.None;
                port.Open();
                int name = port.ReadByte();
                Console.Write(name);
                port.Close();
            }
            finally
            {
                port.Dispose();
                port = null;
            }
        }