![]() ![]() Instead, interfaces should be broken down into smaller, more specific interfaces to prevent clients from being dependent on methods that are irrelevant to their needs.Īdhering to the ISP leads to cleaner, more maintainable code by reducing the coupling between classes and ensuring that interfaces are tailored to specific client requirements. Martin, states that clients should not be forced to implement interfaces they do not use. The Interface Segregation Principle, introduced by Robert C. This article will discuss the Interface Segregation Principle in C#, provide examples, and share best practices to help developers create cleaner, more flexible codebases.ĭefining the Interface Segregation Principle (ISP) One of these principles, the Interface Segregation Principle (ISP), focuses on ensuring that interfaces are concise and tailored to specific needs. C# Interface Segregation Principle (ISP) advocates for small, client-specific interfaces.In the world of object-oriented programming, SOLID principles play a vital role in creating maintainable and scalable software systems. ![]() Public class Aircraft : IRunnable, IFlyable Third, define the Car class that implements only the IRunnable interface because it only needs the Run() method: public class Car: IRunnableįinally, create Aircraft and Car objects and call their methods respectively in the Main() method of the Program class: public class Program Second, define the Aircraft class that implements both interfaces since the Aircraft class needs both Run() and Fly() methods: public class Aircraft : IRunnable, IFlyable To fix the issue of violating the interface segregation principle, you need to break down the large interface into smaller ones.įirst, segregate the IVehicle interface into two smaller interfaces IFlyable and IRunnable: public interface IFlyable Refactoring the program to conform with the Interface Segregation Principle This is an example of violating the Interface Segregation Principle because the IVehicle forces the Car class to use the Fly() method that it doesn’t need. But when we create a Car object and call the Fly() method, it raises an exception: public class Program Since a regular car cannot fly, it raises an exception in the Fly() method: public class Car: IVehicleįinally, create an Aircraft object and call the Run() and Fly() methods. ![]() Third, define a Car class that also implements the IVehicle interface. Second, define an Aircraft class that implements the IVehicle interface: public class Aircraft : IVehicle aircraft var aircraft = new Aircraft() įirst, define an interface IVehicle interface that has two methods Run() and Fly(): public interface IVehicle Public void Fly( ) => throw new NotImplementedException() Public void Fly( ) => Console.Write( "Flying") Public void Run( ) => Console.Write( "Running") Let’s take an example of violating the interface segregation principle: namespace ISP The interface segregation principle promotes the idea of creating small and cohesive interfaces that are specific to the client’s needs. Instead, you should break down larger interfaces into smaller ones that are more focused and targeted to specific use cases. The interface segregation principle suggests that you should not force a client to implement an interface that contains methods that it doesn’t need. ![]() The interface segregation principle is the fourth principle in the five SOLID principles of object-oriented design: Introduction to the C# Interface Segregation Principle Summary: in this tutorial, you’ll learn about the C# Interface Segregation Principle (ISP) that promotes the idea of creating small and focused interfaces that are specific to the needs of clients. ![]()
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