What is the difference between abstract class and interface in .NET?• Abstract class can have both abstract methods as well as concrete methods. But all interface methods are abstract in nature; they will not have any implementation.
• Abstract classes are meant to be inherited but interface doesn’t involve in inheritance. Interfaces can only be implemented and not inherited. • A class can inherit from only one abstract class but a class can implement multiple interfaces. • A class inheriting from an abstract class should override all abstract methods. However it is optional to override the concrete methods. But a class implementing an interface should implement all the interface methods.
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