public DetailsViewModel()
        {
            _selectedEmployee = new Employee();

            var dataServices = new DataServices();

            AddEmployeeCommand = new RelayCommand(async() => await dataServices.AddEmployeeAsync(SelectedEmployee));

            EditEmployeeCommand = new RelayCommand(async() => await dataServices.EditEmployeeAsync(SelectedEmployee));

            DeleteEmployeeCommand = new RelayCommand(async() => await dataServices.DeleteEmmployeeAsync(SelectedEmployee));

            Messenger.Default.Register <Employee>(this, OnEmployeeMessageReceived);
        }