public EditableEventViewModel(IModelFacade facade)
            : base(new EventObject())
        {
            _facade = facade;
            this.AvailableWorkTypes = new ObservableCollection<TeacherWorkType>(_facade.GetAllWorkTypes(ViewModelLocator.CurrentTeacher.Id));

            this.OkButtonText = "Додати";
            _isNewEvent = true;
        }
        public EditableEventViewModel(IModelFacade facade, EventObject eventObject)
            : base(eventObject)
        {
            _facade = facade;
            this.AvailableWorkTypes = new ObservableCollection<TeacherWorkType>(_facade.GetAllWorkTypes(ViewModelLocator.CurrentTeacher.Id));

            this.OkButtonText = "Зберегти";
            this.SelectedWorkKind = eventObject.TeacherWorkKind;
            _isNewEvent = false;
        }