revert to last successful build

Question

Hi, stupid little question here but I made a BIG boo boo with my code and am looking to revert back to the code I used on the last successful build. I can't really figure out how to fix the problem and would find it easier to simply revert back and never try to do what I did again. I can't find any Microsoft help documents on the subject, any way of doing it? Thanks in advance, if you want to directly email me you can get me at:[email protected]