What happens is version conflicts. The dependencies often want to bring in conflicting versions of the grand-dependencies, the lower level libraries like Newtonsoft.Json and log4net and so on. There's a <bindingredirect> syntax in web.config or app.config that allows telling something to look for a different version. This usually works, and Nuget gets it right automatically most of the time, but occasionally there's a real conflict where a version isn't compatible and I spend a day a few times a year dealing with that.