static void Main(string[] args)
{
// The client code may have some of the subsystem's objects already
// created. In this case, it might be worthwhile to initialize the
// Facade with these objects instead of letting the Facade create
// new instances.
Subsystem1 subsystem1 = new Subsystem1();
Subsystem2 subsystem2 = new Subsystem2();
Patterns.Facade facade = new Patterns.Facade(subsystem1, subsystem2);
Client.ClientCode(facade);
}
// The client code works with complex subsystems through a simple
// interface provided by the Facade. When a facade manages the lifecycle
// of the subsystem, the client might not even know about the existence
// of the subsystem. This approach lets you keep the complexity under
// control.
public static void ClientCode(Patterns.Facade facade)
{
Console.Write(facade.Operation());
}