Intellisense not working

Question

I am opening files from a server ASP.net and the VB codebehind files, and my visual studio is not working correctly, Intellisense is dead and if i right click the \"Go to

Answer 1

Sometimes, it could be because of different extension style that you are using for the files.
In my case Intellisense is working in all the files except for a file in a different project of the same solution.
When I have changed the extension of the file to cxx from cpp,it started working.
The includes and other files in the solution are of extension .cxx or .txx.

Thank you