代码如下 :

static void Main(string[] args)        {            Dictionary
     
       di = new Dictionary
      
       ();            di.Add(9, 1);            di.Add(0, 6);            di.Add(2, 8);            var sortedDict = (from entry in di orderby entry.Key ascending select entry)                .ToDictionary(pair => pair.Key, pair => pair.Value);            foreach (var pair in di)            {                Console.WriteLine("{0},{1}", pair.Key, pair.Value);            }            Console.WriteLine("--------------------");            foreach (var pair in sortedDict)            {                Console.WriteLine("{0},{1}", pair.Key, pair.Value);            }            Console.ReadLine();        }
      
     

方法来自stackoverflow