11. Appearance mode (facade pattern)

usingSystem;namespaceconsoleapplication4{classProgram {/// <summary>        ///situations where the appearance mode is not used///at this point the client and three subsystems are sent a coupling, so that the client program depends on the subsystem///to solve this problem, we can use the appearance pattern to design a unified interface for all subsystems .///The client only needs to invoke the method in the skin class, which simplifies the operation of the client///So that tight coupling between the customer and the subsystem is avoided/// </summary>        /// <param name= "args" ></param>        Static voidMain (string[] args) {Subsystema a=NewSubsystema (); Subsystemb b=NewSubsystemb (); SUBSYSTEMC C=NewSUBSYSTEMC ();             A.methoda ();             B.methodb ();             C.METHODC ();        Console.read (); }    }    //subsystem a     Public classSubsystema { Public voidMethodA () {Console.WriteLine ("method A in the execution subsystem a"); }    }    //Subsystem B     Public classSubsystemb { Public voidMethodB () {Console.WriteLine ("Execute method B in subsystem b"); }    }    //Subsystem C     Public classSUBSYSTEMC { Public voidmethodc () {Console.WriteLine ("method C in the execution subsystem C"); }    }}

usingSystem;namespaceconsoleapplication4{classProgram {Private StaticRegistrationfacade facade =NewRegistrationfacade (); /// <summary>        ///situations where the appearance mode is not used///at this point the client and three subsystems are sent a coupling, so that the client program depends on the subsystem///to solve this problem, we can use the appearance pattern to design a unified interface for all subsystems .///The client only needs to invoke the method in the skin class, which simplifies the operation of the client///So that tight coupling between the customer and the subsystem is avoided/// </summary>        /// <param name= "args" ></param>        Static voidMain (string[] args) {facade. Registersystem (1); Façade. Registersystem (2); Façade. Registersystem (3);        Console.read (); }    }     Public classRegistrationfacade {PrivateSubsystema Registrationa; PrivateSubsystemb registrationb; PrivateSUBSYSTEMC Registrationc;  PublicRegistrationfacade () {Registrationa=NewSubsystema (); REGISTRATIONB=NewSubsystemb (); Registrationc=NewSUBSYSTEMC (); }         Public voidRegistersystem (inttype) {            if(Type = =1) {Registrationa.methoda (); }            Else if(Type = =2) {Registrationb.methodb (); }            Else if(Type = =3) {registrationc.methodc (); }        }    }    //subsystem a     Public classSubsystema { Public voidMethodA () {Console.WriteLine ("method A in the execution subsystem a"); }    }    //Subsystem B     Public classSubsystemb { Public voidMethodB () {Console.WriteLine ("Execute method B in subsystem b"); }    }    //Subsystem C     Public classSUBSYSTEMC { Public voidmethodc () {Console.WriteLine ("method C in the execution subsystem C"); }    }}

11. Appearance mode (facade pattern)