score:2
Accepted answer
var setOne = new HashSet<string>(textBoxWords.Text
.Split(new char [] { '\r', '\n' })
.Select(s1 => s1.Trim())
.Where(s2 => !String.IsNullOrEmpty(s2)));
It's not exactly the same as what you have since the result is a HashSet, but based on your scenario it looks like that may be the better data structure for what you are trying to accomplish.
score:1
Your examples are already fairly simple. One alternative would be:
(from s in textBoxWords.Split(new char[] { '\r', '\n' })
where !string.IsNullOrEmpty(s)
select s.Trim()).Distinct();
Source: stackoverflow.com
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