public void IntersectWithTest2() { var bag = new HashBag <int> { 3, 5, 1, 4, 6, 2, 3, 5, 1, 4, 6, 2 }; var l = new List <int> { 1, 1, 2, 3, 3, 4, 5, 7, 8, 9 }; bag.IntersectWith(l); Assert.Equal(new[] { 3, 3, 5, 1, 1, 4, 2 }, bag); }