protected virtual void OnPriceChanged()
{
PriceChangedEventArgs args = new PriceChangedEventArgs(2, 4);
if (PriceChangedEvent !=null)
{
PriceChangedEvent(this, args);
}
}
public void PriceChangedEventSubscriber(object sender, PriceChangedEventArgs args)
{
Console.WriteLine("Old price was :" + args.LastPrice + " New price is: " + args.NewPrice);
}