I cant place this in a base class as We are already using an abstract class for all our controllers at this level. I dont want to expose this method to everything, only these 2 controllers.

I know I have it declared as private at the moment. Ideally what I really want to do, would be to push this back to our service Layer, but because I am returning a PartialView, it will break our model.

In my Controller Folder, we have all our controller files as you'd expect. Can I introduce a file here and call it something like 'SharedController', place my private function here and make it public, and call it from the original 2 controllers?