C#, implement 'static abstract' like methods

Question

I recently ran into a problem where it seems I need a \'static abstract\' method. I know why it is impossible, but how can I work around this limitation?

For example

Answer 1

It's not static if it has to be called on an instance.

If you're not calling it on an instance, then there's no polymorphism at play (i.e. ChildA.Description is completely unrelated to ChildB.Description as far as the language is concerned).