Some times Visual studio environment settings and customizations not working properly due to the
Corrupted window layout file, corrupted menu customization file, or corrupted keyboard shortcuts file. To restore the visual studio its original state follow the below steps.
1. Shut down all instances of Visual Studio.
2. Click Start, the choose Run….
3. Type “devenv.exe /resetuserdata“.
This command will take a couple of minutes to run as Visual Studio cleans up and sets itself back to its original state.