https://bugs.winehq.org/show_bug.cgi?id=42845
--- Comment #13 from mancubus220@gmail.com --- Installing dotnet40 using winetricks worked for me (Fedora 25, upstream winetricks).
Winetricks URLs for dotnet were not working for me earlier and when I tried manually installing the dotnet exe with the wine command it did not work (they didn't set the correct library overrides?).