A typical polymorphism understanding swindle. The main thing is not to forget and overlook anything. What will be the result of execution of the following code?

class Program

{

static void Main(string[] args)

{

MyClassB b = new MyClassB();

MyClassA a = b;

a.abc();

Console.ReadLine();

}

}

class MyClassA

{

public MyClassA()

{

Console.WriteLine("constructor A");

}

public void abc()

{

Console.WriteLine("A");

}

}

class MyClassB:MyClassA

{

public MyClassB()

{

Console.WriteLine("constructor B");

}

public void abc()

{

Console.WriteLine("B");

}

}

Answer :-

constructor A
constructor B
A

During initialization of the B class, the constructor of the A class will be executed by default, then constructor of the B class. After assignment of the b value to a type variable of the A class, we will get an instance of the B class in it. One would think that abc() from the B class should be called, but since there is no specification of any predicate of the abc method in the B class, it hides abc from the A class. The example is not quite correct and abc() in the B class will be underlined, since the new predicate is required.