/// <summary>
/// چک کردن انقضای تخفیف
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public async Task <bool> IsGroupExpired(int id)
{
var model = await TableNoTracking.LastOrDefaultAsync(a => a.ProductGroupId == id && a.IsActive == true);
return(model == null || DateTime.Now > model.EndDate);
}
