class Program

    {

        static void Main()

        {

           

            //构造一个嵌套字典

            Dictionary<int, Dictionary<int, string>> dicExternal = new Dictionary<int, Dictionary<int, string>>();

            for (int i = 90; i > 65; i = i - 5)

            {

                Dictionary<int, string> dicInternal = new Dictionary<int, string>();

                for (int j = i; j > i - 5; j--)

                {

                    char asc = (char)j;

                    dicInternal.Add(j, asc.ToString());

                }

                dicExternal.Add(i, dicInternal);

            }

            //内层字典排序

            Dictionary<int, Dictionary<int, string>> T = new Dictionary<int, Dictionary<int, string>>();

            foreach (int key in dicExternal.Keys)

            {

                Dictionary<int, string> dicOrderInter = new Dictionary<int, string>();

                dicOrderInter = (from p in dicExternal[key] orderby p.Key select p).ToDictionary(pair => pair.Key, pair => pair.Value);

                T.Add(key, dicOrderInter);

            }

            //外层字典排序

            Dictionary<int, Dictionary<int, string>> dicOrderExter = new Dictionary<int, Dictionary<int, string>>();

            dicOrderExter = (from p in T orderby p.Key select p).ToDictionary(pair => pair.Key, pair => pair.Value);

            //输出排序后的所有内层字典的Value

            foreach (int key in dicOrderExter.Keys)

            {

                foreach (int keyInter in dicOrderExter[key].Keys)

                {

                    Console.WriteLine("key:" + keyInter + ",Value:" + dicOrderExter[key][keyInter].ToString());

                }

            }

            Console.ReadLine();

           

        }

    }

运行结果：

 

 

 

 

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