How should I compare values in two lists?

Question

I have two lists

List 01 => { A, B, C, D, E }
List 02 => { F, F, F, F, E }

I need to check if one element of List 02 exists

Answer 1

try

list1.Any(e => list2.Contains(e));

e.g.

var list1 = new List { "A", "B", "C", "D" };
var list2 = new List { "F", "F", "F" };

list1.Any(e => list2.Contains(e)); // returns false

var list3 = new List { "F", "F", "D" };

list1.Any(e => list3.Contains(e)); // returns true

UPDATE: as leppie points out, using Intersect will be more performant, esp if the lists are large.