c# object 动态增加属性和值

  var list = new List<T>();
            foreach (var item in rfcdata)
            {
                 T t = new T();
                IDictionary<string, object> result = new ExpandoObject();
                
                //循环原本数据，放入reuslt
                foreach (var itemmin2 in t.GetType().GetProperties())
                {
                    result.Add(itemmin2.Name, itemmin2.GetValue(itemmin2));
                }
                //循环新增数据，放入reuslt
                foreach (var itemin in clounms)
                {
                    result.Add(itemin, item.GetValue(itemin));
                }
                //转成dynami类型 输出
                list.Add(result as dynamic);
            }
            return list;