public efProductRepository(VLGroupContext context) : base(context) { }
public efCategoryRepository(VLGroupContext context) : base(context) { }
public efOrderRepository(VLGroupContext context) : base(context) { }
public EfUnitOfWork(VLGroupContext _dbcontext) { dbcontext = _dbcontext ?? throw new ArgumentNullException("dbcontext can not be null"); }