Visual Studio 2008 Intellisense missing

Intellisense is suddenly missing from Visual Studio 2008 IDE on a project I am working. 开发者_开发技巧This was working fine. I rebooted the machine several times but still not working. It's working in other projects. What else could be causing this?

Try deleting the .ncb files. Failing that, checkout a clean source tree.

Did you check under Tools/Options/Text Editor/(Your Language) to see if the auto complete is still on? There is "Auto List Members" under General and also Intelesense section has a show option.

A third party dll was throwing an error in design mode. Only when I tried to open the form in Design View I noticed the error.