VB.NET：在基类中声明一个不可重写的函数

Question

我有一个基类foo，它将用于多个功能相似但略有不同的子类：

Public MustInherit Class foo
    Public Function bar1() as Something
        ''// Perfectly OK to change what this method does
    End Function

    Public Function bar2() as Something
        ''// Does a very specific thing I don't want changed ever,
        ''// but this function must be inherited
    End Function
End Class

当子类重写bar2()时，如何让编译器生成错误？

Answer 1

在函数定义中指定NotOverridable关键字：

Public NotOverridable Function bar2() As Something
    ''// Does a very specific thing I don't want changed ever,
    ''// but this function must be inherited
End Function

Answer 2

NotOverridable？