I did a channel 9 interview right before the holidays where I talk about the front end and the IntelliSense architecture in general. I was going to write an intro but I'll be lazy and reuse the one from the interview http://channel9.msdn.com/Shows/C9-GoingNative/GoingNative-5-Inside-the-Visual...

One of the requests we that we often heard from our customers was the ability to disable IntelliSense at will. There are ways of disabling it on previous versions via macros and other tricks (more details about that from this blog post ) but we all agree that if you want to turn off a feature it should...