public MainViewModel(IScheduleCreator scheduleCreator, IInputReader inputReader)
 {
     _scheduleCreator = scheduleCreator;
     _inputReader     = inputReader;
     BrowseCommand    = new RelayCommand(BrowseCommandExecute, BrowseCommandCanExecute);
     CreateSchedule   = new RelayCommand(CreateScheduleExecute, CreateScheduleCanExecute);
     IsFileInput      = true;
 }