In this blog we will know about the types of Polymorphism in vb.net

Polymorphism: - A procedure can assume different forms using Polymorphism. It is of two kinds they are as below:

Inheritance based
Interface based

Inheritance based example: -

Public Class Form1

Inherits System.Windows.Forms.Form

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim a As New raj1

Dim b As New raj2

display(a)

display(b)

End Sub

Public Sub display(ByVal x As raj1)

x.amit("sagar")

End Sub

Public Class raj1

Public Overridable Sub amit(ByVal s As String)

MsgBox("Hello:" & s)

End Sub

End Class

Public Class raj2

Inherits raj1

Public Overrides Sub amit(ByVal s As String)

MsgBox("Hello:" & s)

End Sub

End Class

Interface based example: -

Public Class Form1

Inherits System.Windows.Forms.Form

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim a As New raj1

Dim b As New raj2

display(a)

display(b)

End Sub

Public Sub display(ByVal x As raj)

x.adarsh()

End Sub

Public Interface raj

Sub adarsh()

End Interface

Public Class raj1

Implements raj

Public Sub adarsh() Implements raj.adarsh

MsgBox("Adarsh of raj1")

End Sub

End Class

Public Class raj2

Implements raj

Public Sub adarsh() Implements raj.adarsh

MsgBox("Adarsh of raj")

End Sub

End Class