RajG1978
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Can anyone give sample example where I can implement Interface and in what scenarios I should choose abstract class over interface?
I know the differences between interfaces and abstract class(theoretical). I want to know particularly in .Net in what scenarios I should choose Interface and when I should use abstract sample. Please give me small example for both cases
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Let me say I go for an interview and the interviewer asks me "Give me scenarios where you use Interface and where you would use Abstract class". What will be the answer.
You use both interfaces and abstract class to define a common set of properties and/or methods that different classes need to have so that you can handle them in a common way through polymorphism.
You use an abstract class when you can provide the implementation (code) of some of these methods and properties.
You use an interface when the methods and properties that you want to share all need to be defined (coded) inside of the classes that implement the interface.
Interfaces also have a second role. Since multiple inheritance (inheriting from 2 classes) is not permitted in .NET, an interface can be define to define a second set of common properties and methods that you want to share between classes that already inherits from another one, thus simulating multiple inheritance.
You use an abstract class when you can provide the implementation (code) of some of these methods and properties.
You use an interface when the methods and properties that you want to share all need to be defined (coded) inside of the classes that implement the interface.
Interfaces also have a second role. Since multiple inheritance (inheriting from 2 classes) is not permitted in .NET, an interface can be define to define a second set of common properties and methods that you want to share between classes that already inherits from another one, thus simulating multiple inheritance.
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