Find items existing in both collections using LINQ

Question

Say I have two collections

int[] foo = { 1, 2, 3, 4 }; int[] bar = { 2, 4, 6, 8 }; 

What would be the easiest way to use linq to select values ​​that exist in both collections?

i.e. collection containing 2 and 4.

Answer 1

 int[] result = foo.Intersect(bar).ToArray();