无法获取枚举转换使用Json.NET正确JSON

我有一个枚举：

public enum Animal 
{ 
    Dog, 
    Cat, 
    BlackBear 
}

我需要将其发送到三阶党的API。此API要求枚举值我送小写偶尔需要下划线。在一般情况下，他们需要的名称不匹配我用枚举命名约定

I need to send it to a third-party API. This API requires that the enum values I send be lower case and occasionally require underscores. In general, the names they require don't match the enum naming convention I use.

在使用的 https://gooddevbaddev.wordpress.com/2013/08/26/deserializing-c-enums-using-json-net / ，我试图用一个自定义JsonConverter：

Using the example provided at https://gooddevbaddev.wordpress.com/2013/08/26/deserializing-c-enums-using-json-net/, I tried to use a custom JsonConverter:

public class AnimalConverter : JsonConverter {
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) {
        var animal = (Animal)value;
        switch (animal)
        {
            case Animal.Dog:
            {
                writer.WriteValue("dog");
                break;
            }
            case Animal.Cat:
            {
                writer.WriteValue("cat");
                break;
            }
            case Animal.BlackBear:
            {
                writer.WriteValue("black_bear");
                break;
            }
        }
    }
    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) {
        var enumString = (string)reader.Value;
        Animal? animal = null;
        switch (enumString)
        {
            case "cat":
            {
                animal = Animal.Cat;
                break;
            }
            case "dog":
            {
                animal = Animal.Dog;
                break;
            }
            case "black_bear":
            {
                animal = Animal.BlackBear;
                break;
            }
        }
    }

    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(string);
    }
}

早在一类的属性，我把属性中的动物像这样：

Back in the properties of a class, I put the attributes on the Animal as so:

[JsonProperty("animal")]
[JsonConverter(typeof(AnimalConverter))]
public Animal ZooAnimals { get; set; }

当我虽然运行程序时，它似乎完全忽略JsonConverter和，而不是看到预期值像black_bear或狗，我看BlackBear和狗。我怎样才能获得JsonConverter真正做到从枚举值的字符串名称转换我指定要替换价值？

When I run the program though, it seems to completely ignore the JsonConverter and rather than seeing expected values like "black_bear" or "dog", I see "BlackBear" and "Dog". How can I get the JsonConverter to actually do the conversion from the name of the enum value to the string I specify to replace that value with?

谢谢！