protected virtual void OnPriceChanged(PriceChangedEventArgs e)
{
if (PriceChanged != null)
{
PriceChanged(this, e);
}
}
static void IPhone_Changed(object sender, PriceChangedEventArgs e)
{
Console.WriteLine("年底大促銷,原價{0}元,現價{1}元,快來搶購啊", e.OldPrice, e.NewPrice);
}
