Visual Studio 2012 - Intellisense sometimes disappearing / broken
I use Visual Studio 2012 and I have the same problem. To fix it (when Intellisense is not working anymore), I just have to close the current tab (in which Intellisense is not working) and reopen it. There is no need to close Visual Studio or all the tabs.
These are the few top solutions for getting Visual Studio 2012 intellisense back on track try them one by one, hope one of them will solve the problem:
When the problem occurs next time follow these:
start from #1 and Move to next when the earlier one doesn't work for you
1: Close all the tabs
and open your file again. (Thanks to russds)
2: Clean the Build
> Close the Solution
> Restart Visual Studio
> Open the Solution
again
3: Goto: Edit
> IntelliSense
> Refresh Local Cache
4: Close Visual Studio 2012 and delete this folder: %AppData%\Microsoft\VisualStudio\11.0\ReflectedSchemas
5: Goto: TOOLS
> Import and Export Settings
> Reset all settings
6: Delete .suo
file in the project folder. (Thanks to Jason Steele)
I am hopeful your problem will get solved by any of the above six steps. But if it doesn’t after all this than I think you should consider reinstalling your VS2012.