//最后,该模式要求写一个受保护的(protected)虚方法引发事件.方法名必须和事件名一致,以On作为前缀,并接受唯一的EventArgs参数
protected virtual void OnPriceChanged(PriceChangedEventArgs e)
{
if (PriceChanged != null)
{
PriceChanged(this, e);
}
}
static void stock_PriceChanged(object sender, PriceChangedEventArgs e)
{
//throw new NotImplementedException();
if ((e.NewPrice - e.LastPrice) / e.LastPrice > 0.1M)
{
Console.WriteLine("Alert,10% stock price increase!");
}
}
