http://bugs.winehq.org/show_bug.cgi?id=58661
--- Comment #16 from Stian Low wineryyyyy@gmail.com --- (In reply to Starman from comment #15)
I did something to make it work, I think I used proton for ILSpy, I also had trouble running it
Indeed you seem to be using proton like me to troubleshoot and workaround vanilla bugs.
Confirming that icu.dll is indeed part of ge-proton packages which allows ILSpy to launch.
GE-Proton also seems to include dotnet8 and dotnetdesktop8 as part of the sauce so winetricks wasn't necessary for launch.
Confirming similar blacked-out rendering issues for ILSpy menus as for NomNom.exe.
Because NomNom.exe is reproducible easily for vanilla wine it is still the best app to use for resolving these bugs because ge-proton may cause confusion during vanilla fixes.