Localized Strings does not exist in namespace

Problem:
Having completed the iPhone version of our MVVM cross project, we are back to the Windows Phone version.  I created the baseline phone project and added reference to the Core.  Then I built the Windows Phone 8 project and kept getting this error:
The name "LocalizedStrings" does not exist in the namespace

Solution:
Close Visual Studio. Than, delete sub folders 10.0 and 11.0 from "%LOCALAPPDATA%\Microsoft\Phone Tools\CoreCon\" Open Visual Studio and rebuild solution.

Where
%LOCALAPPDATA% = C:\Users\[USER]\AppData\Local

Source:
http://stackoverflow.com/questions/23237549/vs-2013-the-name-localizedstrings-does-not-exist-in-the-namespace