LINQ query to find if items in a list are contained in another list

Question

I have the following code:

List test1 = new List { \"@bob.com\", \"@tom.com\" };
List test2 = new List

        

Answer 1

bool doesL1ContainsL2 = l1.Intersect(l2).Count() == l2.Count;

L1 and L2 are both List