static void Main(string[] args)
{
ProductServiceBak productServeice = new ProductServiceBak();
Product product = new Product()
{
Name = "中华牙膏3",
Specification = "v.2008",
PurchasedPrice = 11,
SellingPrice = 20,
Description = "good product",
SupplierId = 1,
ExpirationDate = DateTime.Now,
PurchasedDate = DateTime.Now,
CategoryId = 1
};
productServeice.Add(product);
Product product1 = productServeice.GetProductById(2);
Console.WriteLine(product1.Name);
Console.ReadKey();
}
