foreach (var temp in dic.Keys)//這個(gè)語句只是遍歷了字典的鍵，

{? Console.WriteLine("{0}--{1}",temp,dic[temp]) ;??}

如果要成對(duì)的遍歷，則需要用到一個(gè)關(guān)鍵字：KeyValuePair

foreach (KeyValuePair<int , string> temp in dic)

{ Console.WriteLine("{0}--{1}",temp.Key, temp.Value) ; }