SerialPort spL = (SerialPort)sender;
byte[] buf = new byte[spL.BytesToRead];
spL.Read(buf, 0, buf.Length);
_receiveBuffer.AddRange(buf);
SerialPort spL = (SerialPort)sender;
byte[] buf = new byte[spL.BytesToRead];
spL.Read(buf, 0, buf.Length);
_receiveBuffer.AddRange(buf);