What is mean by Shadowing?

Shadowing:

The terms "Shadowing", is defined in VB.Net. In C#, this is known as new keyword.

When the method is defined in the base class, is not able to override and we need to provide a different implementation for the same in the derived class. In this kind of scenario, we can use hide the base class implementation and provide a new implementation using the Shadows(VB.Net)/new(C#) keyword.

Example:

           

Public Class ParentClass

    Public Sub Display()

        Console.WriteLine("Parent class")

    End Sub

End Class

Public Class ChildClass

    Inherits ParentClass

    Public Shadows Sub Display()

        Console.WriteLine("Child class")

    End Sub

End Class

 

 Dim p As New ParentClass

        Dim c As New ChildClass

        Dim pc As ParentClass = New ChildClass

        p.Display()

        c.Display()

        pc.Display()

Output:

Parent class

Child class

Parent class