protected virtual void OnPriceChanged(PriceChangedEventArgs e)
{
if (PriceChanged != null)
{
PriceChanged(this, e);
}
}
static void stock_PriceChanged(object sender, PriceChangedEventArgs e)
{
System.Console.WriteLine($"Price changed: Old: {e.LastPrice} New: {e.NewPrice}");
if ((e.NewPrice - e.LastPrice) / e.LastPrice > 0.1M)
{
System.Console.WriteLine("Price increased 10%!");
}
}
public event EventHandler <PriceChangedEventArgs> PriceChanged; // 2 & 3 Use Framework define generic delegate
protected virtual void OnPriceChanged(PriceChangedEventArgs e) // Protected Virtual Method that fires the event
{
PriceChanged?.Invoke(this, e);
}
static void stock_PriceChanged(object sender, PriceChangedEventArgs e)
{
if ((e.NewPrice - e.LastPrice) / e.LastPrice > 0.1M)
{
Console.WriteLine("Alert, 10% stock price increased!");
}
}
