How to check if an array contains any item of another array

Question

Given 2 int arrays e.g, foo and bar, what\'s the most efficient way to check that the array bar contains at least one item that foo contains. should re

Answer 1

Another solution:

var result = array1.Any(l2 => array2.Contains(l2)) == true ? "its there": "not there";

If you have class instead of built in datatypes like int etc, then need to override Override Equals and GetHashCode implementation for your class.