public void SerializeStack()
        {
            ImmutableStack <string> l = ImmutableStack.From(new List <string>
            {
                "One",
                "II",
                "3"
            });

            string json = JsonConvert.SerializeObject(l, Formatting.Indented);

            Assert.AreEqual(@"[
  ""3"",
  ""II"",
  ""One""
]", json);
        }