http://bugs.winehq.org/show_bug.cgi?id=33513
--- Comment #1 from Daniel Jelinski djelinski1@gmail.com 2013-05-07 13:42:09 CDT --- Actually the class is registered. Registration points to mscoree.dll. create_monodata fails because CodeBase registry value is absent. The assembly is copied to GAC_MSIL, and its strong name is stored in Assembly registry value. Apparently it is enough for native dotnet to load the class successfully.