In that case, your base software entity is your application core functionality. Notice that the single responsibility principle is also applied. Definition. SOLID is an acronym for the following design principles: Single Responsibility Principle Open/Closed Principle Liskov … This will ensure the class and ultimately the whole application is very robust and easy to maintain and expand, if required. Single Responsibility (SRP), Open/Closed (OCP), Liskov's Substitution, Interface Segregation, and Dependency Inversion.Five agile principles that should guide you every time you need to write code. But what exactly is it, is it important to you, should you even care? This time, we’ll discuss the Open/Closed Principle. The open-closed principle also applies to plugin and middleware architecture. The letter O in SOLID stands for the Open-Closed Principle which is also known as OCP. The Open Closed Principle (OCP) states that a class must be open to be extended but closed to changes. In the case of plugins, you have a base or core module that can be plugged with new features and functionality through a … The solution is 100% open for extension and closed for modification. Let us look at this with an example: Reading Time: 8 minutes This blog is part of a series explaining the SOLID design principles by looking at code from real projects or frameworks. Quotes. Open/Closed Principle As the name suggests, this principle states that software entities should be open for extension, but closed for modification. Bertrand Meyer coined the term Open Closed Principle, which first appeared in his book Object-Oriented Software Construction , release in 1988. Please read our previous article before proceeding to this article where we discussed the Single Responsibility Principle in C# with one real-time example. The Open/Closed principle (OCP) is perhaps the most important of all S.O.L.I.D principles. What does it state? As a result, when the business requirements change then the entity can be extended, but not modified. Now you know that Open-Closed means that your code is open to be extended by new functionalities and closed in terms of changing the source code, but appending to it. It is the guiding principle behind most design patterns and other techniques used to build easy-to-extend quality software. Now, a bit about the open-closed principle — This is one principle which if followed properly can reduce development and testing efforts drastically. The Open-Closed principle is a part of SOLID, a mnemonic acronym which bundles a total of 5 design principles. The Open Closed Principle represents the “O” of the five SOLID software engineering principles to write well-designed code that is more readable, maintainable, and easier to upgrade and modify. The strategy pattern is the backbone of the Open/Closed Principle (from Bob Martin's SOLID principles discussed yesterday). Software entities (classes, modules, functions, etc.) The Open/Closed Principle says that “A module should be Open to extension and closed to modification” This principle means that you should be able to change the behavior of a module (e.g. Last time, we looked at the Single Responsibility Principle. a Java Class) by writing new code, instead of changing the existing one. In this article, I am going to discuss the Open-Closed Principle in C# with one real-time example. It is often associated with clean code. The Open-Closed Principle can also be achieved in many other ways, including through the use of inheritance or through compositional design patterns like the Strategy pattern. Hi friends, today I would like to share with you all about a Software Engineering Design Principle — the Open Closed Principle (OCP). It is one of the five design principles for object-oriented… should be open for extension, but closed … Open-Closed Principle in C# with Example.