static void Main(string[] args)
        {
            bool flag = true;

            while (flag)
            {
                string input = "";
                Console.WriteLine("1.  ConsoleEnum1 ");
                Console.WriteLine("2.  ConsoleEscSeq ");
                Console.WriteLine("3.  ConsoleEx1 ");
                Console.WriteLine("4.  ConsoleFormat ");
                Console.WriteLine("5.  ConsoleShift ");
                Console.WriteLine("6.  ConsoleStruct1");
                Console.WriteLine("7.  ConsoleToString");
                Console.WriteLine("8.  MyFirst ");
                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":
                    ConsoleEnum1.consoleEnum1();

                    break;

                case "2":
                    ConsoleEscSeq.consoleEscSeq();
                    break;

                case "3":
                    ConsoleEx1.consoleEx1();
                    break;

                case "4":
                    ConsoleFormat.consoleFormat();
                    break;

                case "5":
                    ConsoleShift.consoleShift();
                    break;

                case "6":
                    ConsoleStruct1.consoleStruct1();
                    break;

                case "7":
                    ConsoleToString.consoleToString();
                    break;

                case "8":
                    MyFirst.myFirst();
                    break;


                default:

                    //flag = false;

                    break;
                }

                Console.Clear();
            }
        }