Linq to Mock: MoQ is born
Regardless of whether you use a mocking framework/library or not, as long as you're doing unit testing, you're almost for sure using mocks. Most of the time they are manual mocks typically not even shared outside the scope of a single test fixture as they contain hardcoded values for return types, helper members, etc.
This works well, but it's counter-productive and plain boring. Mocking interfaces just to implement the one or two members you're interested sucks. ...