https://bugs.winehq.org/show_bug.cgi?id=48290
--- Comment #5 from sahelanthropus 3dw_50ssu16amyn7@byom.de --- If there's no access restriction on the temp folder you could try setting the key TargetFrameworkVersion in C.csproj to "v4.5" or installing dotnet40 if its not already installed. I may set the wrong target version.