http://bugs.winehq.org/show_bug.cgi?id=21583
--- Comment #3 from Nikolay Sivov bunglehead@gmail.com 2010-02-03 11:41:29 --- Don't use mono for dotnet apps. Always prefer native .NET installed with Wine. If it depends on .NET 2.0 use 'winetricks dotnet20'. Script is here (http://www.kegel.com/wine/winetricks).