public static void Init()
{
string connectionString = ConfigurationManager.ConnectionStrings["LiteCommerce"].ConnectionString;
//TODO : Khởi tạo các BLL Khi cần sử dụng
CatalogBLL.Initialize(connectionString);
EmployeeBLL.Initialize(connectionString);
CountryBLL.Initialize(connectionString);
AttributeBLL.Initialize(connectionString);
ProductAttributeBLL.Initialize(connectionString);
UserAccountBLL.Initialize(connectionString);
OrderBLL.Initialize(connectionString);
}