Question

I’m using Visual C# 2010 Express. I have 2 Lists of zip codes each of which do NOT contain duplicates in and of themselves (the list items are all distinct). However, when comparing the 2 Lists there is some overlap, and I want to make a third list that contains only the overlap. Is there a method I can use to do this?

Answer 1

You can use Enumerable.Intersect:

var duplicates = list1.Intersect(list2);