[Snap-photo-devel] List<T> vs. Set<T>

[Maciej S. <m.s...@gm...>]

So we use List<T>s (or at least IList<T>s) all over the place, where
we are implicitly ignoring the occurence of duplicates. Should we
maybe move this all to Set<T>s? I've added a lot of stuff to the
Set<T> class, and have tested it thoroughly. Maybe we should move to
ISet<T>s instead, in case we ever feel like implementing a Set<T>-like
class in another way. Either way, though, it seems like it's a bad
idea to use IList<T>s where we really mean "IList<T>, but with no
duplicates". I guess the major catch is that since Set<T> is
implemented on top of a dictionary, and not a list, we lose the
ordered property. I don't know if any code actually depended on this.
Set<T> does implement ICollection (among other things), so it should
be pretty easy to work with, but I thought I'd check with you guys in
case there is a good reason to use IList<T> in some place (mostly I'm
talking about passing around IList<T>s of IPictureInfos for filtering
purposes)...