public void SerializeHashSet() { ImmutableHashSet <string> l = ImmutableHashSet.From(new List <string> { "One", "II", "3" }); string json = JsonConvert.SerializeObject(l, Formatting.Indented); JArray a = JArray.Parse(json); Assert.AreEqual(3, a.Count); Assert.IsTrue(a.Any(t => t.DeepEquals("One"))); Assert.IsTrue(a.Any(t => t.DeepEquals("II"))); Assert.IsTrue(a.Any(t => t.DeepEquals("3"))); }