When should we use interface and abstract class in C#?

1. If you are creating something that provides common functionality to unrelated classes, use an interface . 2. If you are creating something for objects that are closely related in a hierarchy, use an abstract class.

Abstract class and interface both can’t be instantiated. But there are many differences between abstract class and interface that are given below. … Difference between abstract class and interface. Abstract classInterface3) Abstract class can have final, non-final, static and non-static variables.Interface has only static and final variables.Difference between Abstract class and Interface – Javatpoint www.javatpoint.com › difference-between-abstract-class-and-interface

If the functionality we are creating will be useful across a wide range of disparate objects, use an interface . Abstract classes should be used primarily for objects that are closely related, whereas interfaces are best suited for providing a common functionality to unrelated classes.