using System; using FacadeLib; // Compile with csc /r:FacadeLib.dll Facade2Main.cs class FacadePattern1 { class Client { public void ClientMain () { Facade.Operation1(); Facade.Operation2(); } } static void Main() { new Client().ClientMain(); } } /* Output: Operation 1 Subsystem A, Method A1 Subsystem A, Method A2 Subsystem B, Method B1 Operation 2 Subsystem B, Method B1 Subsystem C, Method C1 */