Can I use Linq's Except() with a lambda expression comparer?

Question

I know I can call linq\'s Except and specify a custom IEqualityComparer, but implementing a new Comparer class for each data type seems like an overkill for this purpose. Ca

Answer 1

Here' is l except r solution, based on a LINQ outer join technique:

from l in new[] { 1, 2, 3 }
join r in new[] { 2, 4, 5 }
on l equals r
into rr
where !rr.Any()
select l

Will yield: 1, 3