public static void emptyClass()
        {
            Console.WriteLine("建立一個 EmptyClass  物件");
            EmptyClass A;

            A = new EmptyClass();
            Console.WriteLine("A 物件建立完成");
            Console.WriteLine("請按 Enter 結束");

            Console.Read();
        }
        static void Main(string[] args)
        {
            len = args.Length;
            arr = new string[len];
            arr = args;

            bool flag = true;

            while (flag)
            {
                string input = "";
                Console.WriteLine("1.  EmptyClass ");
                //Console.WriteLine("2.  ConsoleForEach1 ");
                //Console.WriteLine("3.  ConsoleAryForEach2 ");
                //Console.WriteLine("4.  ConsoleSort1");
                //Console.WriteLine("5.  CC4512");
                //Console.WriteLine("6.  CC4513");
                //Console.WriteLine("7.  CC4514");
                //Console.WriteLine("8.  CC4525");
                //Console.WriteLine("9.  CC4526");
                //Console.WriteLine("10. CC4527");
                //Console.WriteLine("11. ReadArg");
                //Console.WriteLine("12. ConsoleAmount");
                //Console.WriteLine("13. ConsoleMethod1");
                //Console.WriteLine("14. ConsoleMethod2");
                //Console.WriteLine("15. ConsoleMethod3");
                //Console.WriteLine("16. ConsoleMethod4");
                //Console.WriteLine("17. CallValue");
                //Console.WriteLine("18. ConsoleByRef");
                //Console.WriteLine("19. ConsoleByOut");
                //Console.WriteLine("20. ConsoleGetMax");
                //Console.WriteLine("21. ConsoleOverLoads");
                //Console.WriteLine("22. ConsoleStaticVar");
                //Console.WriteLine("23.  CC4511");



                Console.WriteLine("------------------------");
                Console.WriteLine("請輸入要執行的範例");

                input = Console.ReadLine();

                switch (input)
                {
                case "0":
                    flag = false;

                    break;

                case "1":
                    EmptyClass.emptyClass();
                    break;


                default:

                    //flag = false;

                    break;
                }

                Console.Clear();
            }
        }