title: question about port
body: <p>i have a problem
  i am writing a code in C# 
  i wanna receive a byte from serial port 
  but when i wanna receive data from port that sounds my program is hang
  and doesnt work  any more</p>
  
  <pre><code> SerialPort port = new SerialPort("COM3");
   port.Open();
   byte[] b = new byte[10];
   port.Read(b, 0, 1);
   port.Close();
  </code></pre>
  
  <p>please help me</p>