https://bugs.winehq.org/show_bug.cgi?id=25167
--- Comment #10 from Esme Povirk madewokherd@gmail.com --- I did some work on importing this from corefx: https://github.com/madewokherd/mono/tree/principal
Due to bugs/gaps in Wine's implementation of functions that these classes use, I can't commit the import without introducing regressions.