static void Main(string[] args)
{
ProductStock ps = new ProductStock("螺蛳粉", 3);
Console.WriteLine($"{DateTime.Now.ToShortDateString()}{ps.Name}库存{ps.GetInventory()}");
Consumer cm1 = new Consumer("张三");
cm1.Buy(ps, 1);
Thread.Sleep(2000);
Consumer cm2 = new Consumer("李四");
cm2.Buy(ps, 1);
Thread.Sleep(2000);
Consumer cm3 = new Consumer("王五");
cm3.Buy(ps, 1);
}
void DealsAreDoneHandler(object sender, MessageEventArgs e)
{
ProductStock ps = (ProductStock)sender;
Console.WriteLine($"{e.Consumer}购买{e.Amount}份{ps.Name}，交易成功！{ps.Name},{DateTime.Now}库存{ps.GetInventory()}");
}
void UnderStockHandler(object sender, MessageEventArgs e)
{
ProductStock ps = (ProductStock)sender;
Console.WriteLine($"{e.Consumer}欲购买{e.Amount}份{ps.Name}，库存不足！{ps.Name},{DateTime.Now}库存{ps.GetInventory()}");
}