I know that I've seen this somewhere before, but I was reminded again this evening. I like being able to have a visual cue when I'm approaching the (likely arbitrary) right edge of my coding page. Sure, you can keep one of your eyes on the column number along the bottom status bar, but then, who watches the code?
Well, thanks to Roy Osherove, I now have the tip and the time at the same moment and have added the vertical rules to my Visual Studio sessions at 80 and 120 columns.
It looks something like this:
If you want to save some time, just click here to get the .reg file (download and check it first to be safe and backup the registry! ).