Remove duplicates from list and sort

[hard2bhumble]

I am trying to remove duplicates from a comma separated list and sort it alphabetically. I'm not sure of the best method. I have achieved what I want the long way, but I think I should be able to use a Sorted Set, list or collection to achieve the same thing far more efficiently.
does anyone have any suggestions?
(e.g.) One, Five, Seven, One, Three, Four --> One, Three, Four, Five, Seven

 

[Diancecht]

Please don't double post.

Cheers,
Dian