VS 2013 發生的錯誤
https://stackoverflow.com/questions/23893497/no-editoroptiondefinition-export-found-error
1. Close Visual Studio
2. Open the folder: %LocalAppData%\Microsoft\VisualStudio\12.0\ (in C:\users\'%userName%'\AppData\Local\Microsoft\VisualStudio\12.0\)
3. Rename the ComponentModelCache folder
4. Restart Visual Studio.