C# HashTable添加键和值

        static void Main(string[] args)
        {
            Hashtable ht  = new  Hashtable();//实例化对象

            ht.Add("a","张三");//添加键和值
            ht.Add("b", "李四");
            ht.Add("c", "王五");
            ht.Add("d", "赵六");

            foreach (DictionaryEntry item in ht)//循环输出
            {
                Console.WriteLine("{0},{1}",item.Key,item.Value);               
            }
            Console.ReadKey();
        }
    }

 先添加  using System.Collections;  命名空间