I'm getting weird errors including errors inside comments (see screenshot).
Visual Studio 2010
Targeting .NET 4
Addons:
- PInvoke.net
- PowerCommands for Visual Studio 2010
- Productivity Power Tools
- SQL Server Compact Toolbox
- Visual Assist X

It seems to me, there are two types of errors:
Syntax errors (e.g. connection underlined - probably because the declaration is commented out).
Grammar errors (e.g. "Dropbox" in comments).
Nowadays, most IDEs check your documentation comments for typos, using a dictionary (thesaurus). If a word is not in the dictionary, it is underlined. Of course, the grammar checking often can't recognize a path and it just considers every path component a word.
cb.DataSourceas well... It should still build fine though. - Some programmer dudeconnectionandPre1p14p2AdpandMakeAdapter(connection)aren't correct either. Maybe those are the reason why your project is not building? - Nolonar