Polymorphism is one one of the main aspect of OOPS Principles which include method overriding and method overloading. Virtual and Override keyword are used for method overriding and new keyword is used for method hiding. In this article, In this article, I am going to explain each keyword in details with the help of C code.
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In some scenario, we need base class functionality also while overriding the method of that class. For that I have changed code of class B like following. Now if you run the code you will see output of both method as expected. After looking into above example some people will argue that this functionality will be achieved by new keyword also.
This is call Method Hiding where with new keyword you can hide functionality of base class. But wait there is a difference. One with reference to base class A and another B itself. Now you run this code. Following is output. Add this DLL is in the project and inherits the base class and uses the Display Method and see what happens: Here I inherit the base class and use the same method. See, it gave me a warning.
Now I will use the new keyword and try to call this method. Now anyone can guess the output: Quite interesting For most users the output should be like.
This new keyword hides the value only for that class. And out of this class or in another class when you call this method it will call the Base class Display Method.
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