Newtonsoft.Json.Linq

var json = "{"name":"ok1","sex":"man"}";
            //Newtonsoft.Json.Linq 将json转换成IEnumerable集合对象在遍历 
            string ids = ((IEnumerable)json).Cast<Newtonsoft.Json.Linq.JObject>().
                Aggregate("", (a, item) => a + (item["name"]) + ",");