How do you prevent another class from inheriting and/or prevent a class from overriding a member.
VB.Net Prevent Derivation
With VB.Net, use the NotInheritable keyword to prevent a class from being inherited from and use the NotOverridable keyword to prevent a method from being overridden.
A method marked NotOverridable must override an ancestor method. If you mark a class NotInheritable, all members are implicitly not overridable so the NotOverridable keyword is not legal.
Syntax Example:
Public Class Machine
Public Overridable Sub Speak(ByRef pSentence As String) MessageBox.Show(pSentence) End Sub End Class
Public Class Robot Inherits Machine
Public NotOverridable Overrides Sub Speak(ByRef pSentence As String) MessageBox.Show(pSentence) End Sub End Class
Public NotInheritable Class Cyborg Inherits Robot End Class
VB.Net
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