NotOverridable Keyword

[sonia.sardana]

First of all I want to ask dat,is it a valid keyword. I have read it from MSDN help.

NotOverridable means that if we declare a method in base class with keyword NotOverridable , we cannot override that nethod in derived class.
But when I m declaring a method in base class as NotOverridable , I m getting the error, Check the code below--


Public Class base
Public NotOverridable Sub test()
Console.WriteLi ne("soia")
End Sub
End Class
Sub main()
Dim obj As New base
obj.test()
Console.ReadLin e()
End Sub

ERROr-
'NotOverridable ' cannot be specified for methods that do not override another method.

[balabaster]

It is saying that you can't create a method defined NotOverrideable unless that class itself Overrides another:

For instance:
[Code=vb]Private NotOverrideable Overrides Function ToString() As String
Return "Hello World"
End Function[/Code]