static void Main(string[] args)
{
PrinterFactory printerFactory = new PrinterFactory();
IPrinter printer1 = printerFactory.NewPrinter("Epson");
IPrinter printer2 = printerFactory.NewPrinter("HP");
printer1.ShouldBeType <EpsonPrinter>();
printer2.ShouldBeType <HpPrinter>();
new Action(() => printerFactory.NewPrinter("Other")).ShouldThrow <NotFoundException>();
Console.WriteLine("Test done");
Console.ReadKey(false);
}