public MainWindow()
{
InitializeComponent();
var viewModel = new TimeTrackerViewModel();
DataContext = viewModel;
}
private void Months_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var month = new Month();
Enum.TryParse(Months.SelectedValue.ToString(), out MonthName monthName);
month.MonthName = monthName;
List <int> test;
test = month.Days;
var vm = new TimeTrackerViewModel();
//listDays.ItemsSource = vm.Days;
DataContext = vm;
}