幻想魚的幻想空間

static void Main(string[] args)
        {
            // [] is specific type and fixed length.
            // It is a data structure.
            String[] arr = new string[] {"Hi", "I", "am", "ALam"};
            ShowMessage(arr);

            // List is specific type and unbounded length. 
            // namespace is System.Collection.Generic
            List list = new List();
            list.Add("Hi");
            list.Add("I");
            list.Add("am");
            list.Add("Alam");
            ShowMessage(list);

            // ArrayList is any type and undounded length.
            // namespace is System.Collection
            ArrayList arraylist = new ArrayList();
            arraylist.Add("Hi");
            arraylist.Add("I");
            arraylist.Add("am");
            arraylist.Add("Alam");
            arraylist.Add(12345); // when we call the ShowMessage, it will be wrong.
            ShowMessage(arraylist);
        }

        private static void ShowMessage(string[] temp)
        {
            foreach (string aaa in temp)
            {
                Console.WriteLine("{0}", aaa);
            }
            Console.ReadLine();
        }

        private static void ShowMessage(List temp)
        {
            foreach (string aaa in temp)
            {
                Console.WriteLine("{0}", aaa);
            }
            Console.ReadLine();
            }

        private static void ShowMessage(ArrayList temp)
        {
            foreach (string aaa in temp)
            {
                Console.WriteLine("{0}", aaa);
            }
            Console.ReadLine();
        }
    }