[redmand]

I'll use them for data passing within a class. The calling method needs multiple values of differing types and I can't personally justify creating a class just to encapsulate those values for a call or two. So I tuple. But that tuple stays within that class and is never exposed or stored.

[arwhatever]

Good call on the encapsulation. I've encountered the occasional public API with methods that require some type like a Tuple<int, int, string>, and got pretty peeved. And go ahead and name the argument "values" or something similar, for good measure.

[PJDK]

The new tuples do allow names, which can be a nice half way house so you can do something like

(bool success, string errormessage, foo addedItem)

as a return type. A big step up from Tuple<bool, string, foo>!