namespace Example_QueryTest
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建哈希表，并添加元素
            Hashtable ht = new Hashtable();
            ht.Add("banana","香蕉");
            ht.Add("apple","苹果");
            ht.Add("pineapple","菠萝");
            ht.Add("orange","桔子");
            //使用键集合遍历哈希表
            Console.WriteLine("通过键遍历哈希表集合得到的值");
            foreach (string mykey in ht.Keys)
            {
            string str=(string)ht[mykey];
            Console.WriteLine(str);
            }
请问结果为什么是:菠萝,桔子,苹果,,香蕉.而不是香蕉,苹果,菠萝,桔子??