Obviously, implementing them was possible, but what would consumption be like? It turns out, it's amazing. There were already some open-source options available, but none of them had an API that I loved. They often allowed direct access to the internal value, which I felt defeated the purpose.

So, I decided to create Danom with a few key goals in mind:

- Opinionated Monads: Focus on Option and Result rather than a more generic Choice type.

- Exhaustive Matching: An API that enforces exhaustive matching to ensure all cases are handled.

- Fluent API: Designed for chaining operations seamlessly.

- Integration: Fully integrated with ASP.NET Core and Fluent Validation.

Danom has exceeded my expectations, making functional programming patterns in C# not only possible but enjoyable. If you’re interested in bringing some of the functional programming paradigms from F# into your C# projects, I’d love for you to check it out.

You can find the project on GitHub: https://github.com/pimbrouwers/danom

Or, on NuGet: https://www.nuget.org/packages/Danom

Looking forward to your feedback and contributions!