public void Operation(Facade facade)
{
facade.Operation();
}
public static void ClientCode(Facade fasade)
{
Console.WriteLine(fasade.Operation());
}
// The program 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 ProgramCode(Facade facade)
{
Console.Write(facade.Operation());
}