Our friend from Microsoft, Scott Guthrie, blogs about some intellisense problems with AJAX.  Apparently they will be fixed in Visual Studio service pack 1 along with 1200 -- count 'em -- Twelve Hundred other bugs.  Quite frankly, intellisense has never worked 100% of the time for me.  Perhaps ajax is partly to blame, but I have noticed my mileage varies depending on what other files I have open in the IDE - weird errors... scary, spooky errors... The kind of errors that keep you up at night.  The kind of errors that prevent compilation but that disappear once those files are closed and then the project compiles just fine.   I, for one, am excited about the prospect of 1200 bug fixes.  Too bad the bug fix will introduce 1200 more bugs.  But then they'll announce that the next version of Visual Studio, code named "PayUsAgain", will fix those bugs.  Ok Microsoft guys, relax, I'm just kidding.  Visual Studio is an awesome product.  What would we use otherwise?  Dreamweaver?  *laughs*  Notepad?   I remember the days I didn't trust anything *but* notepad, but then I got hooked on intellisense and color coding, and once you're hooked, there's no going back.   You start getting the shakes and your mouth gets all dry.  You call the guy's beeper and then go meet him in the park: "Yeah man, you got my visual studio?  I need a fix.  Just pick an object and press period after it to pull up the intellisense for all the properties and methods.  Yeah, that's it, right there.  That's nice. "