I'm writing a C# style guide for my team and I'm trying to describe the benefits of side-effect-free functional-style methods. I want to include online references to back up the suggestions, but I can't seem to Google the kind of functional method chaining I have in mind.
When I think "method chain", I imagine something like this (in Ruby)
where each method returns a new object (maybe even of a different class) and everything is side-effect-free, so it's like composing functions in a functional language. Writing function-like methods make these kinds of chains very easy to construct and, in my experience, greatly simplify code.
But when I Google "C# method chaining", I keep finding stuff like this
where each method mutates and returns the receiver. This is pretty much the opposite of functional programming and, if anything, is the kind of thing I want to discourage on my team. Even when I Google "C# functional method chaining", the top result is blog post about
StringBuilder, which relies entirely on the side-effects of each method call!
Is there a different term for this than just "method chaining"? Or, even better, is there some place that documents the benefits of this style?