Interface

Question

I have an interface that interface have one method for example void Add(). I implemented that void Add() method in 100 class then I would like to Change the method in Interface void add() into int Add(). So I Could not change int add() method in 100 class.without changing int add() method in 100 class.How to resolve this scenario. AnyOne Could You please guide me ?. Advance Thanks,

Girish Sapariya · Answer

Hi Lingaraj An interface contains only the signatures of methods  properties  events or indexers . A class that implements the interface must implement the members of the interface that are specified in the interface definition. So if you change the return type of a function in the Interface you will have to change it in the respective classes where interface has been implemented or else it will give error:  'ClassName' does not implement interface member FunctionName() .

lingaraj Arthanari · Answer

Thanks Girish Sapariya