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。
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