Question

i have to find out whether or not two collections have any intersection, the way that i did that is using LINQ’s “Join” to get the Intersection of the two collections and then i use “Any”. But i wonder, is there other more “elegant” way of doing this?

Answer 1

Enumerable.Intersect is probably what you’re looking for.

From MSDN:

int[] id1 = { 44, 26, 92, 30, 71, 38 };
int[] id2 = { 39, 59, 83, 47, 26, 4, 30 };
IEnumerable<int> both = id1.Intersect(id2);
if(both.Any())...