C# 如何将键值附加到现有JToken

我想在现有JToken中添加“count”。

JToken el={“count\u数据”：{ "20140903": 8, "20140905": 4, "20140918": 12 }}

JToken el={"count_data": {
  "20140903": 8,
  "20140905": 4,
  "20140918": 12
}}  

el.AddAfterSelf(new JToken("{\"count\":2}"))

            foreach (var a in ((Newtonsoft.Json.Linq.JProperty)(el)))
            {
                int i = 0;
                foreach (var value in ((Newtonsoft.Json.Linq.JObject)(a)))
                {
                    i = i + Convert.ToInt32(value.Value);
                    Console.WriteLine(value.Value);
                }
                if (i != 0)
                {
                    el.Parent["count"] = i;
                }
                else {
                    el.Parent["count"] = 0;
                }
            }