c#的字典序

//Dictionary 
System.Collections.DictionaryEntry dic=new System.Collections.DictionaryEntry("key1","value1"); 

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

//加入重复键会引发异常 
fruit.Add(1, "苹果"); 
fruit.Add(2, "桔子"); 
fruit.Add(3, "香蕉"); 
fruit.Add(4, "菠萝"); 

//因为引入了泛型，所以键取出后不需要进行Object到int的转换，值的集合也一样 
foreach (int i in fruit.Keys) 
{ 
Console.WriteLine("键是：{0} 值是：{1}",i,fruit); 
} 
//删除指定键，值 
fruit.Remove(1); 
//判断是否包含指定键 
if (fruit.ContainsKey(1)) 
{ 
Console.WriteLine("包含此键"); 
} 
//清除集合中所有对象 
fruit.Clear(); 
}