dictionary 用linQ排序

Dictionary<string, int> letterWordTotalNum = wordsMrg.GetAllLetterTotalNum();
                var dicSort = from d in letterWordTotalNum 
                                  orderby d.Key  
                                  select d;

               foreach (string key in dicSort.Keys)

  {

                      s    Response.Write(dicSort[key] + "<br />");

                       }

按key进行升序排列，如需将序排列，则 orderby d.Key  descending，排序之后仍然是一个键值对的集合。