public HseDatePicker()
 {
     this.InitializeComponent();
     //DataContext = this;
     InputTextBox.AddHandler(KeyDownEvent, new KeyEventHandler((s, e) =>
     {
         if (e.Key == Windows.System.VirtualKey.Enter || e.Key == Windows.System.VirtualKey.Space)
         {
             //DatePickerPart.SelectedDateRange = new CalendarDateRange(SelectedDateTime, SelectedDateTime);
             //DatePickerPart.DisplayDate = SelectedDateTime;
             UpdateSelectedDateTimeString(SelectedDateTime.ToString("dd/MM/yyyy"));
         }
         else if (e.Key == Windows.System.VirtualKey.Delete)
         {
             SelectedDateTime = new DateTime();
             //DatePickerPart.SelectedDateRange = null;
             //DatePickerPart.MoveToDate(DateTime.Now);
             UpdateSelectedDateTimeString("");
         }
     }), true);
 }