C#中遍历Hashtable的4种方法

   static void Main(string[] args)
        {
            Hashtable ht=new Hashtable();
            ht.Add("", "");
            ht.Add("", "");
            ht.Add("", "");
            ht.Add("", "");

            //遍历方法一：遍历哈希表中的键
            foreach(string key in ht.Keys)
            {
                //Console.WriteLine(string.Format("{0}-{1}"), key, ht[key]);
                Console.WriteLine(string.Format("{0}-{1}", key, ht[key]));
            }
            Console.WriteLine("**********************************************************");
            //遍历方法二：遍历哈希表中的值
            foreach(string value in ht.Values)
            {
                Console.WriteLine(value);
            }
            Console.WriteLine("**********************************************************");
            //遍历方法三：遍历哈希表中的键值
            foreach(DictionaryEntry de in ht)
            {
                Console.WriteLine(string.Format("{0}-{1}", de.Key, de.Value));
            }
            Console.WriteLine("**********************************************************");
            //遍历方法四：遍历哈希表中的键值
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            bool flag = myEnumerator.MoveNext();
            while (flag)
            {
                Console.WriteLine(myEnumerator.Key + "-" + myEnumerator.Value);
                //  Console.WriteLine(ht[myEnumerator.Key]);//ht[myEnumerator.Key]== myEnumerator.Value=true;
                flag = myEnumerator.MoveNext();
            }
            Console.Read();
        }