private void CatDelete_Click(object sender, RoutedEventArgs e)
        {
            dataAccess data = new dataAccess();
            categories cat  = new categories();

            if (CategoryNumber.Text == "")
            {
                MessageBox.Show("Category ID field is Empty ,Enter The ID");
            }
            else
            {
                cat.CategoryID   = int.Parse(CategoryNumber.Text);
                cat.CategoryName = CategoryName.Text;
                data.deleteCat(cat);
                MessageBox.Show("Category " + cat.CategoryName + " Has been removed successfully");
            }
        }