Visual Studio Intellisense not showing some classes

Question

My Visual Studio is not showing a lot of the available classes in the IntelliSense auto-complete. For example, a project I\'m working on has a reference to the Microso

Answer 1

OK so probably not the best solution but it works. I reinstalled Visual Studio and the problem was fixed. Also, it hasn't shown up since (this happened about 3 months ago).