JsonConvert.Deserialize附加到默认属性值。如何防止这种情况发生？

public class MyClass
{
    [JsonProperty("myProperty")]
    public string MyProperty { get; set; }
}

public class MyConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(MyClass);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var jsonObject = JObject.Load(reader);
        var myProperty = jsonObject["myProperty"].ToString();

        if (myProperty != "default")
        {
            return new MyClass { MyProperty = myProperty };
        }
        else
        {
            return null; // 或者抛出异常，根据需求进行处理
        }
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

var settings = new JsonSerializerSettings
{
    Converters = new List<JsonConverter> { new MyConverter() }
};

var myObject = JsonConvert.DeserializeObject<MyClass>(jsonString, settings);

var settings = new JsonSerializerSettings
{
    DefaultValueHandling = DefaultValueHandling.Ignore
};

var myObject = JsonConvert.DeserializeObject<MyClass>(jsonString, settings);