+7  A: 

Those dots represent space characters. You will also see little arrows for tabs, and little hooked arrows for carriage returns.

Press CTRL + R + W to toggle the dots you're seeing.

BTW this is a standard Visual Studio feature. It has nothing to do with CodeRush or any other plugin.

EDIT As Martin points out, you could press CTRL + R, then CTRL + W. Personally I press CTRL then hold it down for the R & W keystrokes. It's less typing.

Drew Noakes
should be Ctrl-R, Ctrl-W
M4N
Thank you! Thank you! One day they just appeared! I must have smacked some additional keys at one time or another! Thanks again!
mattruma
You're welcome. I use that shortcut on occasion to see whether a file is filled with tabs or spaces. I can imagine they'd be pretty annoying if they were visible all the time :)
Drew Noakes
Thank you - I managed to hit that key by accident, and it was driving me crazy trying to reverse it!
Gravitas