I refactored a type and now my project is f'd up

I had something like List but I needed it as another type so I refactored it to a GameObject and now my debug log looks like this: http://i.imgur.com/IlXdMEY.png?1?6358

This is the code when I click on the second error: http://i.imgur.com/on7iF6O.png?1

Does anyone know what the hell I did and how I can fix it?

Double check your project references and double check there isn’t another GameObject class defined elsewhere. This would cause an ambiguity with UnityEngine.Object and cause errors like that.