访问嵌套的键值对

对于下面的数据，我有一个相对简单的嵌套JSON字符串:

{  "d" : {
     "humidity": "39.21",
     "acc_y": "1.21",
     "ambient_temp": "24.21",
     "air_pressure": "1029.21",
     "object_temp": "23.21",
     "acc_z": "0.21",
     "acc_x": "3.21",
   } 
}

我有一个c# windows服务应用程序，它接收JSON字符串和反序列化字符串。

private static void client_MqttMsgPublishReceived(object sender, uPLibrary.Networking.M2Mqtt.Messages.MqttMsgPublishEventArgs e)
    {
        //Console.WriteLine(System.Text.Encoding.Default.GetString(e.Message));
        string json = System.Text.Encoding.Default.GetString(e.Message);
        var obj = JsonConvert.DeserializeObject<IDictionary<string, object>>(json, new JsonConverter[] { new MyConverter() });
    }

我有一个Myconvert类，看起来像这样，它读取JSON:

class MyConverter : CustomCreationConverter<IDictionary<string, object>>
{
    public override IDictionary<string, object> Create(Type objectType)
    {
        return new Dictionary<string, object>();
    }
    public override bool CanConvert(Type objectType)
    {
        // in addition to handling IDictionary<string, object>
        // we want to handle the deserialization of dict value
        // which is of type object
        return objectType == typeof(object) || base.CanConvert(objectType);
    }
    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        if (reader.TokenType == JsonToken.StartObject
            || reader.TokenType == JsonToken.Null)
            return base.ReadJson(reader, objectType, existingValue, serializer);
        // if the next token is not an object
        // then fall back on standard deserializer (strings, numbers etc.)
        return serializer.Deserialize(reader);
    }
}

我可以在obj对象的调试窗口中看到JSON数据。

这可能是一个非常直接的问题，我如何提取JSON键值对数据(例如。湿度，环境温度)在我的程序中使用，因为目前我只能在调试窗口中看到它们?

谢谢你的帮助!

class Wrapper
{
    public Dictionary<string, object> d { get; set; }
}

Dictionary<string, object> obj = JsonConvert.DeserializeObject<Wrapper>(json).d;