bugmenot,
Reformatting other people's code is a neurotic stunt losers perform after they finish their daily quota of memory leaks.
There's nothing intuitive about turning a single-keystroke command into two keystrokes, nor do you "give the developer control" by doing arbitrary stuff he never asked for. Control is when it does what I tell it to, not when it runs amok on its own initiative.
You haven't quite explained all the lunatic exceptions to the rules, either: How does it serve your weird masochistic tendencies for the following line to be reformatted only if the line you paste has a certain configuration of whitespace in it? Can you explain that? And what about reformatting a line when you paste something into the middle of it? Do you only ever paste text into the middle of lines other people wrote? Is that it?
By the way, does the word "diff" ring any bells with you?
This foolishness makes no sense whatsoever to anybody who hasn't been behaviorally conditioned by Word to sit there obediently while the editor makes arbitrary and aggressively moronic formatting decisions.
Thanks for the pointer on how to turn it off, though. My bad assumption there was that the feature could (as in software designed by rational adults, and as with much else in DevStudio) be disabled for all languages in the same place, so I was looking under "All Languages". But it turns out they didn't do it consistently; it seems not to be implemented for C++, for example. Which makes sense: If you're bright enough to learn C++, you've earned the right to write your code in peace. They only punish the idiots. This is what I get for wasting my time on C#.
Lastly: "Wrap my head around it"? Why would I waste my time doing that? This is destructive, undesired, nonstandard behavior. I can see what it's doing, and what it's doing is idiotic. The designer's rationale for doing idiotic things is of no interest to me; he's the idiot, not me. But there's a remote chance that, if enough people complain about these imbecilic user-harassment decisions at Microsoft, such decisions will be made microscopically less often. Unlikely, but you take your chances in life. Same reason you vote.