.NET (Core and Framework)

private void OnDataReceived(object sender, SerialDataReceivedEventArgs e) <br />
{ <br />
while(port != null && port.BytesToRead > 0) <br />
{ <br />
int Cnt = port.Read(portBuf, portPos, 1); <br />
<br />
if (Cnt != 0) <br />
{ <br />
//Read from input buffer <br />
if (portBuf[portPos] == '\n') <br />
{ <br />
string sentence = Encoding.ASCII.GetString(portBuf, 0, portPos-1); <br />
AddResult(sentence); <br />
<br />
portPos = 0; <br />
} <br />
else <br />
{ <br />
portPos++; <br />
} <br />
} <br />
} // while <br />
} <br />
<br />

<br />
private void btnClosePort_Click(object sender, System.EventArgs e) <br />
{ <br />
Cursor.Current = Cursors.WaitCursor; <br />
<br />
// Wait for things to settle <br />
Thread.Sleep(1000); <br />
<br />
try <br />
{ <br />
  port.DataReceived -= new SerialDataReceivedEventHandler(OnDataReceived); <br />
  // Wait <br />
Thread.Sleep(1000); <br />
<br />
  port.Close(); <br />
  port.Dispose(); <br />
  port = null; <br />
} <br />
catch (Exception ex) <br />
{ <br />
  AddResult("-->Failure"); <br />
  AddResult(ex.ToString()); <br />
} <br />
<br />
Cursor.Current = Cursors.Default; <br />
<br />
AddResult("-->Closed"); <br />
}<br />