The dropdown menus in the code editor stopped working in Visual Studio 2013 for me.
The problem is a bug when using multiple monitors and a “leftmost” monitor that is not the “main” display…
The solution is quite simple for now: make your leftmost monitor the main monitor.
A bugfix is coming, included in next Visual Studio update.
More info:
ide – Visual Studio 2013 Update 2 – C# navigation bar drop down menus not working – Stack Overflow.