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Interview Q & A >> C# >> What are Interfaces?

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What are Interfaces? (Views: 1724)


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C# provides an alternate approach known as interface to support the concept of multiple inheritance. Although a C# class cannot be a subclass of more than one superclass, it can implement more than one interface, thereby enabling us to create classes that build upon other classes without the problems created by multiple inheritance.
An interface in C# is a reference type. It is basically a kind of class with some differences. Major differences include:
- All the members of an interface are implicitly public and abstract.
- An interface cannot contain constant fields, constructors and destructors.
- Its members cannot be declared static.
- Since the methods in an interface are abstract, they do not include implementation code.
- An interface can inherit multiple interfaces.
An interface can contain one or more methods, properties, indexers and events but none of them are implemented in the interface itself. It is the responsibility of the class that implements the interface to define the code for implementation of these members.

Submitted By: Anonymous | Created On: 5/16/2009 4:41:07 PM

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