public static void Run()
{
var hp = new HP("HP", "HP LaserJet Pro MFP M28a");
var canon = new Canon("Canon", "Laser Fax L150");
Console.WriteLine("<Visitor Pattern Example>");
Console.WriteLine();
hp.Accept(new PrintVisitor());
canon.Accept(new PrintVisitor());
hp.Accept(new FaxVisitor());
canon.Accept(new FaxVisitor());
Console.WriteLine();
Console.WriteLine("</Visitor Pattern Example>");
Console.WriteLine();
}