When and why would you extract an abstractput a new method frominto an interface instead of an abstract base class to an interface?

I've never heard of an 'abstrat' class.. Fixed with abstract.

edit approved Feb 8, 2016 at 6:40

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I have been asked the following question in an interview the question: "What is the need of an interface when you can have an abstract method inwithin an abstratabstract class?" which Which I did not know the answer to.

Could you provide an example why and when it may be useful?

c# object-oriented interfaces abstract-class

reworded the question

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edit approved Feb 7, 2016 at 16:09

Andy

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C sharp interview question problem When and why would you extract an abstract method from an abstract class to an interface?

I am facing below questionhave been asked in everyan interview. What the question: "What is the need of an interface if Iwhen you have an abstract method in abstractan abstrat class?" which I did not know the answer to.