Compiler Error of the Day

Here is a compiler error I got while quickly throwing together a custom collection:

Public Overrides Sub RemoveAt(index As Integer)' cannot override 'Public Overridable NotOverridable Sub RemoveAt(index As Integer)' because it is declared 'NotOverridable'

Overridable NotOverridable?! Huh?! Yet another reason why Visual Basic really chaps my hide.