让Json.Net将布尔值序列化为字符串

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

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

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        JToken token = JToken.Load(reader);
        return token.Value<string>() == "true";
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        string boolString = ((bool)value) ? "true" : "false";
        writer.WriteValue(boolString);
    }
}

using Newtonsoft.Json;

public class MyClass
{
    [JsonConverter(typeof(BooleanToStringConverter))]
    public bool MyBooleanProperty { get; set; }
}

MyClass obj = new MyClass();
obj.MyBooleanProperty = true;

string json = JsonConvert.SerializeObject(obj);
// 输出: {"MyBooleanProperty":"true"}