I'm looking for a tool to annotate code in Visual Studio. By which I mean this: I'm debugging and see a line of code I want to make a note about. So I right-click (or use a keyboard shortcut, or whatever) and am able to type in my note about the code. It stays with that line, but doesn't become part of the code file itself. (Thus I'm able to make the note without checking out the file.) Bonus points if it figures out how to stay with the same line even through code changes, or at least remembers the original contents and/or context of the line at the time I annotated it.
Anyone know of such a thing?