Comparing two collections for equality irrespective of the order of items in them

Question

I would like to compare two collections (in C#), but I\'m not sure of the best way to implement this efficiently.

I\'ve read the other thread about Enumerable.Sequen

Answer 1

If you use Shouldly, you can use ShouldAllBe with Contains.

collection1 = {1, 2, 3, 4};
collection2 = {2, 4, 1, 3};

collection1.ShouldAllBe(item=>collection2.Contains(item)); // true

And finally, you can write an extension.

public static class ShouldlyIEnumerableExtensions
{
    public static void ShouldEquivalentTo(this IEnumerable list, IEnumerable equivalent)
    {
        list.ShouldAllBe(l => equivalent.Contains(l));
    }
}

UPDATE

A optional parameter exists on ShouldBe method.

collection1.ShouldBe(collection2, ignoreOrder: true); // true