I'm new to TDD and xUnit so I want to test my method that looks something like:

List DeleteElements(this List a, List b);

Is there any Assert method that I can use ? I think something like this would be nice

List values = new List() { 1, 2, 3 };
List expected = new List() { 1 };
List actual = values.DeleteElements(new List() { 2, 3 });

Assert.Exact(expected, actual);

Is there something like this ?