// oldtext 是json字符串
List<object> jb = JsonConvert.DeserializeObject<List<object>>(oldtext);
            
            //方法一:
            foreach (JObject item in jb)
            { 
                foreach (var itm in item.Properties())
                {
                    Console.WriteLine(itm.Name); 
                    Console.WriteLine(itm.Value); 
                } 
            }


            //方法二：
            JArray json = JArray.Parse(oldtext);

            foreach (JObject items in json)
            {
                foreach (var item in items)
                {
                    Console.WriteLine(item.Key);
                    Console.WriteLine(item.Value); 
                }
            }