Ginger Grant has a great intro on setting up R Tools for Visual Studio:
For those people who haven’t made the decision as far as which tool to use, let me offer two compelling reasons to pick Visual Studio [VS] instead of R Studio: Intellisense and Improved Debugging Tools. R studio does not have intellisense and it is not possible to debug your code by stepping through it in the manner that many developers of VS are already quite familiar. You will need to configure VS to use R tools, which are detailed below.
Those are nice features. I’m still a big fan of R Studio, but have seen big improvements in R Tools for Visual Studio, so I imagine I’ll make the switch by the end of the year.