About virtual com port in arm

[Resultuk]

I run the project on armbian 5.8, I access the virtual COMPORT that is bound to USBotg when opening an exception occurs.

System.IO.Ports 5.0.0

static SerialPort port = new SerialPort("/dev/ttyGS0") { BaudRate = 9600, ReceivedBytesThreshold = 1, ReadTimeout = 500, WriteTimeout = 500, DtrEnable = false };

System.IO.IOException: Invalid argument
at System.IO.Ports.SerialStream.set_DtrEnable(Boolean value)
at System.IO.Ports.SerialStream..ctor(String portName, Int32 baudRate, Parity parity, Int32 dataBits, StopBits stopBits, Int32 readTimeout, Int32 writeTimeout, Handshake handshake, Boolean dtrEnable, Boolean rtsEnable, Boolean discardNull, Byte parityReplace)
at System.IO.Ports.SerialPort.Open()
at TestPort.Program.Main(String[] args)