What's the best name for a non-mutating “add” method on an immutable collection?

Question

Sorry for the waffly title - if I could come up with a concise title, I wouldn\'t have to ask the question.

Suppose I have an immutable list type. It has an operat

Answer 1

Personally, I like .With(). If I was using the object, after reading the documentation or the code comments, it would be clear what it does, and it reads ok in the source code.

object.With("My new item as well");

Or, you add "Along" with it.. :)

object.AlongWith("this new item");