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Alex Rivera
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List1 contains items { A, B } and List2 contains items { A, B, C } . What I need is to be returned { C } when I use Except Linq extension. Instead I get returned { A, B } and if I flip the lists around in my expression the result is { A, B, C } . Am I misunderstanding the point of Except? Is there another extension I am not seeing to use? I have looked through and tried a number of different posts on this matter with no success thus far. var except = List1.Except(List2); //This is the line I have thus far EDIT: Yes I was comparing simple objects. I have never used IEqualityComparer , it was interesting to learn about. Thanks all for the help. The problem was not implementing the comparer. The linked blog post and example below where helpful.
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