How to find different elements of Arraylist?

Question

Programming

Tell me, there are 2 collections

ArrayList result1 = new ArrayList();
result1.Add("Привет")
result1.Add("Привет2")
result1.Add("Привет3")
result1.Add("Привет4")
result1.Add("Привет5")



ArrayList result2 = new ArrayList();
result2.Add("Привет")
result2.Add("Привет3")
result2.Add("Привет5")

The task is to display or save different values ​​anywhere, namely - Hello2, Hello4. How to do it?

Answer 1

Working with sets

Answer 2

result1.Except(result2).Union(result2.Except(result1));