public void TestCreateUpdateTask()
        {
            TaskEntity entity = new TaskEntity
            {
                TaskId = new TaskId(),
                Initiator = new IdentityId().GetIdentity(),
                Priority = Priority.Normal,
                Status = TaskStatus.Created,
                Created = DateTime.UtcNow,
                Name = "Name",
                Subject = "Subject"
            };

            Task task = new Task(entity)
                            {
                                LoggingService = new Mock<ILoggingService>().Object,
                                Priority = Priority.High

                            };

            TaskDao dao=new TaskDao(SessionFactory);
            task.Accept(dao);
            //update priority
            task.Priority = Priority.Medium;
            task.Name = "New Name";
            task.Subject = "New Subject";
            task.Accept(dao);
            task.AddComment("Bad comment");
            task.AddComment("Good comment");
            task.Accept(dao);
            TrickVisitor visitor=new TrickVisitor
                                     {
                                         OnEntityVisit = e=>e.Version=1
                                     };
            task.Accept(visitor);
            task.Name = "123";
            task.Accept(dao);
        }