//Use the Bridge Pattern.
//The Runner class creates an instance of the PrinterPortal class "injecting" the different implementations of the Bridge classes.

PrinterPortal portal;

portal = new PrinterPortal(new PrinterBridge.InkJetPrinter());
Console.WriteLine("{0}\n", portal.PrintOperation());
portal = null;

portal = new PrinterPortal(new PrinterBridge.LaserPrinter());
Console.WriteLine("{0}\n", portal.PrintOperation());
portal = null;

portal = new PrinterPortal(new PrinterBridge.DotMatrixPrinter());
Console.WriteLine("{0}\n", portal.PrintOperation());
portal = null;