C# 键值对数据排序代码

            Console.WriteLine("Org===============");
            travelDicKeyDate(dd);

            Dictionary<DateTime, String> dicAsc = dd.OrderBy(p => p.Key).ToDictionary(p => p.Key, p => p.Value);
            Console.WriteLine("Asc===============");
            travelDicKeyDate(dicAsc);

            Dictionary<DateTime, String> dicDesc = dd.OrderByDescending(p => p.Key).ToDictionary(p => p.Key, p => p.Value);
            Console.WriteLine("Desc===============");
            travelDicKeyDate(dicDesc);
        }        public static void travelDicKeyDate(Dictionary<DateTime, String> dic)
        {
            foreach (KeyValuePair<DateTime,String> kvp in dic)
            {
                Console.WriteLine(String.Format("{0}  {1}",kvp.Key,kvp.Value));
            }
        }
</div> 
output:

Org===============
2013/9/27 11:07:29  bbb
2013/9/26 11:07:29  ccc
2013/9/28 11:07:29  aaa
Asc===============
2013/9/26 11:07:29  ccc
2013/9/27 11:07:29  bbb
2013/9/28 11:07:29  aaa
Desc===============
2013/9/28 11:07:29  aaa
2013/9/27 11:07:29  bbb
2013/9/26 11:07:29  ccc