Exception Using VB Expressions in Visual Studio 2012 RC

When using VB Workflow projects in Visual Studio 2012 RC, you may receive a System.InvalidCastException while editing expressions. The Exception message would be similar to the following:   An exception has been encountered. This may be caused by an extension. You can get more information by examining the file’C:\Users\username\AppData\Roaming\Microsoft\VisualStudio\11.0\ActivityLog.xml’.     After closing the exception, IntelliSense…