Why does the IEnumerable.Select() works in 1 of 2 cases ? Can not be inferred from usage

Question

I get this error message:

The type arguments for method \'System.Linq.Enumerable.Select(System.Collections.Generic.IE         


        

Answer 1

I suspect that Add returns void - is that right? If so there is no way of projecting that to a Func<,> - only to an Action - and Select wants the Func<,>.

Select is not the same as an indirect `foreach