You can at the cost of breaking good practices and maintaining unsafe code. Other answers will provide you with nasty tricks to achieve this.
I dont like answers that just says “you should not do that”, but I would like to suggest there probably is a better way to achieve the result you seek for.
The strategy pattern as suggested in a comment by @manni66 is a good one.
You should also think about data oriented design, since a class hierarchy does not look like a wise choice in your case.