Hashtable元素的删除

 static void Main(string[] args)
        {
            Hashtable ht = new Hashtable();
            ht.Add(1,"张三");
            ht.Add(true,"李四");
            ht.Add(3,"王五");

            foreach (DictionaryEntry item in ht)
            {
                Console.WriteLine("键{0},值{1}",item.Key,item.Value);
            }
            Console.WriteLine("-------------------------------------");
            ht.Remove(1);   //移除键为1的列
            foreach (DictionaryEntry item in ht)
            {
                Console.WriteLine("键{0},值{1}", item.Key, item.Value);
            }
            Console.Read();

            ht.Clear();//清空所有元素
        }