void UpdateDate()
{
var date = AddDatePicker.GetDate(Element).ToNSDate();
_picker.SetDate(date, false);
_preSelectedDate = date;
}
void CreateDialog()
{
var date = AddDatePicker.GetDate(Element);
_dialog = new DatePickerDialog(_view.Context, (o, e) => {
AddDatePicker.SetDate(Element, e.Date);
_command?.Execute(e.Date);
_view.ClearFocus();
_dialog.CancelEvent -= OnCancelButtonClicked;
_dialog = null;
}, date.Year, date.Month - 1, date.Day);
_dialog.SetCanceledOnTouchOutside(true);
}