public void Insert() { list.Insert(5, "derp"); list[5].Should().Be("derp"); list[0] = "Hello world!"; list[0].Should().Be("Hello world!"); set.Insert(8, "wot"); set[8].Should().Be("wot"); set[set.Count - 1] = "Hello world!"; set[set.Count - 1].Should().Be("Hello world!"); }