示例#1
0
        static void CommandPattern()
        {
            Console.WriteLine("\n\nCommandPattern Pattern");
            var history        = new History();
            var exampleService = new ExampleService("Initial value");
            var exampleCommand = new ExampleCommand(history, exampleService);
            var undoCommand    = new UndoCommand <string>(history);

            Console.WriteLine(exampleService.GetContent());
            exampleCommand.Execute();
            Console.WriteLine(exampleService.GetContent());
            undoCommand.Execute();
            Console.WriteLine(exampleService.GetContent());
        }