Bishops Goutweed aka Bishop Weed, Snow-on-the-mountain (Aegopodium podagraria variegatum) is usually recommended as a ground cover for hard to grow areas. It works great! So great that your whole garden will be covered with it in no time. This invasive reproduces by seed that can be carried in the wind and by rhizomes (spreading, underground roots that send new stokes up).
This plant is deer and rabbit resistant. To prevent seeding, cut the flower heads off as soon as you notice them.
The best control is not planting it at all. If your garden does contain this hostile plant, some sprays may be effective but you're likely going to need to do some heavy digging to get all those roots and runners to completely remove it.