How to check if two sequences have the same elements?

How to check if two sequences have the same elements

regardless of order and duplicates?

var list1 = new[] {1, 2, 3, 4};

var list2 = new[] {4, 3, 2, 1};

bool areEqual = !list1.Except(list2).Any() &&

!list2.Except(list1).Any();

Console.WriteLine(areEqual); // Output: True

Explanation:

This checks if both lists contain the same elements, ignoring order and duplicates.