Currently I have two controllers
1 - Parent Controller
2 - Child Controller
I access my Parent Controller like this
someurl\\parentc
An option beyond using default mvc routing is to look at Attribute Routing - https://github.com/mccalltd/AttributeRouting. Although its more work, decorating individual action methods provides a ton of flexibility when you need to design complicated routes. You can also use it in conjunction with standard MVC routing.