title: Serial Port not working but work in hyper terminal
body: <p>I implement application Serial Port with C# and send data using it.
  but don't working. 
  I send "A" character and my hardware not working
  but I send it by hyper terminal Application or SimpleTerm and worked. </p>
  
  <p>my Code application :</p>
  
  <pre><code>if (_port.IsOpen)
              {
                  _port.Close();
              }
              _port.PortName = cmport.Text;
              _port.Parity = (Parity)Enum.Parse(typeof(Parity), cmparity.Text);
              _port.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cmstopbit.Text);
              _port.DataBits = Convert.ToInt32(cmdatabit.Text);
              _port.BaudRate = Convert.ToInt32(cmboundrate.Text);
              _port.Handshake = Handshake.None;
              if (!_port.IsOpen)
                      {
                          _port.Open();
                      }
  
                      _port.Write(textBoxX1.Text.Trim());
  </code></pre>