check whether a List contains an element in another List using LINQ

Question

How do I check whether a List contains an element that exists in another List using LINQ in C#? I don\'t want to use a for/while loop.

So, if List1 has A, B, C and L

Answer 1

Try this:

List a = ...
List b = ...
var inComon = a.Intersect(b).Any();