private void init()
 {
     openTaskViewController = new OpenTaskViewController(navigationController);
     openTestViewController = new OpenTestViewController(navigationController);
     presentTaskViewController = new PresentTaskViewController(navigationController);
     presentTestViewController = new PresentTestViewController(navigationController);
 }
 public void showOpenTask(string nameTest)
 {
     openTaskViewController = new OpenTaskViewController(this);
     openTaskViewController.selectTask(nameTest);
     openTaskViewController.ShowDialog();
 }