appsettings.json, so I decided to go with JSON5.appsettings.json and everything works perfectly fine. So far so good, but Rider complains that you can't have them in a json file..json5 so I renamed the file to appsettings.json5 and changed.json. I tried to be sneaky and use .5.json with a file association in Rider, but no cigar, also getting NREs.