Provides a fully-featured Option type, aka a Maybe type, with several companion helpers (parsing, LINQ). An Option type allows to represent objects that are either something (a value or a reference) or nothing. Nullable Reference Types (NRT) do not count since they are not actual .NET types but annotations that are ignored at run-time. A tutorial along with guidelines is available on the project website.
$ dotnet add package Abc.MaybeNo README available.