The C# classes solutions are doing the same thing as the F# solution, but in a more complicated way. You don’t really need the Amb operator to solve that proble

The C# classes solutions are doing the same thing as the F# solution, but in a more complicated way. You don’t really need the Amb operator to solve that problem using the list monad or list comprehension or doing a join. I’ve never seen anyone complain that you should have an Amb operator in SQL when you are doing a JOIN.