private void ErrandsButton_Click(object sender, RoutedEventArgs e)
        {
            ManageErrandsPage manageErrands = new ManageErrandsPage();

            this.NavigationService.Navigate(manageErrands);
        }
        private void NavigateBack()
        {
            ManageErrandsPage manageErrandsPage = new ManageErrandsPage();

            this.NavigationService.Navigate(manageErrandsPage);
        }