C＃的Dictionary字典集合按照key键进行升序和降序排列

//这个是集合
Dictionary<int, string> list = new Dictionary<int, string>();
//升序
Dictionary<int, string> dic_asc = list.OrderBy(p => p.Key).ToDictionary(p => p.Key, o => o.Value);
//降序
Dictionary<int, string> dic_desc = list.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, o => o.Value);