As we have declared all the methods within the IPrinterTasks interface, then it is mandatory for the LiquidInkjetPrinter class to provide implementation to Scan and Print methods along with the Fax and PrintDulex method, which are not required by the class. As you can see in the above diagram, we have two classes HPLaserJetPrinter and LiquidInkjetPrinter, who want the printer service.īut the requirement is the HPLaserJetPrinter wants all the services provided by the IPrinterTasks while the LiquidInkjetPrinter wants only the Print and Scan service of the printer. Now if any class wants to implement this interface, then that class should and must have to provide the implementation to all four methods of the IPrinterTasks interface. Here, you can see we have one interface and two classes implementing that Interface.Īs you can see in the above diagram, we have an interface, i.e., IPrinterTasks declared with four methods. Please have a look at the following diagram. Let us understand Interface Segregation Principle in C# with an example. Example to Understand Interface Segregation Principle in C#. That means we shouldn’t force any class to implement any method(s) that they don’t require. Secondly, instead of creating large or, you can say, fat interfaces, create multiple smaller interfaces with the aim that the clients should only think about the methods that are of interest to them.Īs per the Single Responsibility Principle of SOLID, interfaces should also have a single responsibility, like classes.First, no class should be forced to implement any method(s) of an interface they don’t use.Let us break down the above definition into two parts. Rather than one fat interface, numerous little interfaces are preferred based on groups of methods, with each interface serving one submodule. The Interface Segregation Principle states Clients should not be forced to implement any methods they don’t use. How to Use Interface Segregation Principle in C#? What is the Interface Segregation Principle in C#?.Example using the Interface Segregation Principle in C#.Example without using the Interface Segregation Principle in C#.What is Interface Segregation Principle in C#?. As part of this article, we are going to discuss the following pointers in detail. The letter I in the SOL ID Design Principle stands for Interface Segregation Principle, also known as ISP. Please read our previous article before proceeding to this article, where we discussed the Liskov Substitution Principle in C# with Examples. In this article, I am going to discuss the Interface Segregation Principle in C# with Examples. Data Structures and Algorithms Tutorialsīack to: SOLID Design Principles in C# Interface Segregation Principle in C# with Examples.
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