Thank god for editors like Vim and build systems which use "Make" and other command line tools. These keep our mind fit enough to do some exercise in case of emergency. Nevertheless we still want that intellisense thing to work, because we have this "IDE" here and it must be better than any editor. So here is how you get it working again:
- Close the solution.
- Go to the directory of the solution and delete the .ncb file.
- Re-open the solution and build it once. The .ncb file must be regenerated now. This must wake up intellisense again and get it working.
- If not then delete the obj directory of the project also and then build it again.