private static void Main(string[] args)
        {
            string[] data = new string[] { "tom", "jane", "alex" };
            Console.WriteLine("Choose output type(1:Text; 2:HTML");

            int type;

            type = int.Parse(Console.ReadLine());
            OutputFileContext file = null;

            switch (type)
            {
            case 1:
                file = new OutputFileContext(new OutputTextFile());
                break;

            case 2:
                file = new OutputFileContext(new OutputHTMLFile());
                break;

            default:
                break;
            }
            file.OutputFile(data);

            Console.ReadLine();
        }
        private static void Main(string[] args)
        {
            string[] data = new string[] { "tom", "jane", "alex" };
            Console.WriteLine("Choose output type(1:Text; 2:HTML");

            int type;
            type = int.Parse(Console.ReadLine());
            OutputFileContext file = null;
            switch (type)
            {
                case 1:
                    file = new OutputFileContext(new OutputTextFile());
                    break;
                case 2:
                    file = new OutputFileContext(new OutputHTMLFile());
                    break;
                default:
                    break;
            }
            file.OutputFile(data);

            Console.ReadLine();
        }