Well you're right of course. But my only thought here is that Dustin's code looks like idiomatic C#, but yours does not. You can do function composition in C#

Well you're right of course. But my only thought here is that Dustin's code looks like idiomatic C#, but yours does not. You can do function composition in C# but I've virtually (heh) never seen it. Classes and Interfaces are the default abstractions in C# land even if there are other available.