Interface Abstract Class C

An interface only allows you to define functionality not implement it. In c an interface is used if various implementations only shared method signatures. An abstract class is allowed to have all access modifiers for all of its member declaration while in interface we can not declare any access modifier including public as all the members of interface are implicitly public.
interface vs abstract class c# interface and abstract class in c#

Optionally an interface may define default implementations for some or all of its members.

Interface abstract class c. We cant use an abstract base class because the objects already inherit base classes and c doesnt allow multiple inheritance and even if the classes didnt already inherit classes we might later wish to add a new behavior that implements say icrashable so. However an abstract class is permitted to map interface methods onto abstract methods. The implementation logic is provided by its derived classes. An abstract class is used to define the actual identity of a class and it is used as the object or the same type.

Like a non abstract class an abstract class must provide implementations of all members of the interfaces that are listed in the base class list of the class. We cant use an interface because interfaces only permit public members. The abstract classes are typically used to define a base class in the class hierarchy. An abstract class allows you to create functionality that subclasses can implement or override.

An interface on the other hand is just a pattern which cannot do anything. Note here i am talking about the access specifiers of the member of interface and not about the interface. Abstract classes and interfaces. An abstract class is a way to achieve the abstraction in c.

On implementation of an interface you must override all of its methods. In c an interface is used to define the outer abilities of a class. For more information see default interface methods. This class must contain at least one abstract method which is marked by the keyword or modifier abstract in the class definition.

An abstract class is never intended to be instantiated directly. Definition of abstract class and interface in c an abstract class is a special type of class which may contain definition with no implementation. Any class or struct that implements the interface must implement all its members. An interface is typically like an abstract base class with only abstract members.

It can have abstract as well as non abstract methods. Like abstract classes interfaces cannot be used to create objects in the example above it is not possible to create an ianimal object in the program class interface methods do not have a body the body is provided by the implement class.