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  • I understand your comment about UI layer binding, but in this case there exists a standardized, canonical string representation of Foo, so it makes sense to have Foo.ToString and Foo.Parse. Commented Jan 22, 2018 at 15:41
  • And, w.r.t. my bolded question, can you give me an example from the .NET BCL that uses this pattern? Commented Jan 22, 2018 at 15:46
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    How is that a monad? Commented Jan 22, 2018 at 15:49
  • @Heinzi: Any method that returns a Func<T> would meet that criteria, if you include in T the information you need. Returning detailed error information is largely up to you. Have you considered using a Maybe<T>? See mikhail.io/2016/01/monads-explained-in-csharp Commented Jan 22, 2018 at 15:49
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    @JacquesB: I was kinda wondering the same thing. The method signature is compatible with modanic behavior, but that's about it. Commented Jan 22, 2018 at 15:50