private void button_Click(object sender, RoutedEventArgs e)
{
AddHolidayType addHolidayType = new AddHolidayType();
addHolidayType.mode = 1;
addHolidayType.Show();
}
private void edit_Click(object sender, RoutedEventArgs e)
{
var x = ((HolidayType)datagridview.SelectedItem);
AddHolidayType addHolidayType = new AddHolidayType();
addHolidayType.holidaytypeid = x.HolidayTypeID;
addHolidayType.mode = 2;
addHolidayType.Show();
}