public void Monitor(object sender, StockChangeEventArgs e)
 {
     if (e.Stock.Symbol == "GOOG")
     {
         Console.WriteLine("Google's has reached the target price: {0}", e.Stock.Price);
     }
 }
 public void Monitor(object sender, StockChangeEventArgs e)
 {
     if (e.Stock.Symbol == "MSFT" && e.Stock.Price > 10.00m)
     {
         Console.WriteLine("Microsoft has reached the target price: {0}", e.Stock.Price);
     }
 }