I don\'t know what happen with my Visual Studio 2013 Update 2.
When I opened my project, it displayed this message:
No exports were foun
If you download Visual Studio 2013 from Microsoft you will find the path C:\Users\{username}\AppData\Local\Microsoft\WDexpress\12.0\ComponentModelCache.
C:\Users\{username}\AppData\Local\Microsoft\WDexpress\12.0\ComponentModelCache
You should remove the file Microsoft.VisualStudio.Default.cache.
Microsoft.VisualStudio.Default.cache
Then restart Visual Studio.