https://bugs.winehq.org/show_bug.cgi?id=57399
--- Comment #1 from osu_Vanilla@126.com --- btw, my COM33 links to /dev/ttyUSB0, which is a CH340 USB serial converter. Also, the SerialPort is from wine-mono, I compile the code with mono, target 4.0.
Actually, I found wine bug #52340, which shows SerialPort implement uses corefx: https://github.com/madewokherd/mono/pull/22. FYI, revert the commit will not help.