The facade pattern is also a good candidate if the sub system contains many different methods while you would need just a few of those methods from among them — you can use the facade design ...

Illustrate the "Facade" pattern with an UML class diagram (see above). As a bonus, there is also an UML sequence diagram to illustrate the "Builder" Design Pattern: ...

The Session Façade design pattern is a must-have to successfully develop software with J2EE. It is difficult to decide how to most effectively use Session Façade in a specific project.

The Facade Design Pattern in C# is actually an extra class (i.e., a Wrapper class or, you can say, Facade Class) that sits at the top of the above classes. Please have a look at the following diagram ...