public int[] ExpectWith_IntValues_ElementsFromSecondSetWasRemoved(int[] set, int[] other)
        {
            AddValues(set);

            _intSet.ExceptWith(other);

            return(_intSet.ToArray());
        }
 public void ExpectWith_NullOther_ArgumentNullException()
 => Assert.Catch <ArgumentNullException>(() => _filledIntSet.ExceptWith(null));