Newtonsoft.json: NullValueHandling.Ignore not working as expected with Dictionary

[webm0nk3y]

We are serializing Dictionary objects which may or may not have null values and were expecting these to be excluded when serilized with the NullValueHandling.Ignore option. Is this the correct expectation?

See code below for an example.

  var obj1 = new Dictionary<string, string>
  {
    ["a"] = "Value 1",
    ["b"] = null
  };
  var jsonSerializerSettings = new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore };
  var json = JsonConvert.SerializeObject(obj1, Formatting.Indented, jsonSerializerSettings);
  var obj2 = JsonConvert.DeserializeObject<Dictionary<string, string>>(json);
  Debug.Assert(obj2.ContainsKey("a"));
  Debug.Assert(!obj2.ContainsKey("b")); // this fails

[JamesNK]

It applies to class properties, not dictionaries.

[gunsh]

I'd say this is by design.

Still, I am having the same issue. How could one achieve the required functionality? For instance, serializing the following won't get rid of nulls.

new JObject { ["test"] = null }