public void DuplicateTest() { var map = new RedBlackTreeDictionary<int, string>(); map[1] = "1"; Assert.AreEqual("1", map[1]); map[2] = "2"; Assert.AreEqual("2", map[2]); map[1] = "3"; Assert.AreEqual("3", map[1]); Assert.AreEqual(2, map.Count); }