Find if listA contains any elements not in listB

Question

I have two lists:

List listA     
List listB

How to check using LINQ if in the listA exists an element w

Answer 1

List has Contains method that return bool. We can use that method in query.

List listA = new List();
List listB = new List();
listA.AddRange(new int[] { 1,2,3,4,5 });
listB.AddRange(new int[] { 3,5,6,7,8 });

var v = from x in listA
        where !listB.Contains(x)
        select x;

foreach (int i in v)
    Console.WriteLine(i);