Public Interface IMyInterface
    Sub MyMethod()
    Property MyProperty() As String
End Interface
Public Class MyBaseClass
    Implements IMyInterface
    Protected Friend Overridable Sub MyMethod() Implements IMyInterface.MyMethod
        ' do something
    End Sub
    Public Property MyProperty() As String Implements IMyInterface.MyProperty
        Get
            ' do something
        End Get
        Set(ByVal Value As String)
            ' do something
        End Set
    End Property
End Class

Class MyInheritClass
    Inherits MyBaseClass
    Private Overrides Sub MyMethod() ' <<< das geht ja leider nicht!
    End Sub
End Class