https://bugs.winehq.org/show_bug.cgi?id=44324
--- Comment #6 from Fabian Maurer dark.shadow4@web.de --- That's not a wine issue then, that's the program having broken linux support. On a side note, it works for me, even though I get that exception when closing the program.
Anyways, this is the wine bugtracker, and mono is not wine. I don't see a wine bug here.