Once every couple of months Intellisense craps out on me. The symptoms: Ctrl+Space doesn't work; Go to definition displays a dialog: "Cannot navigate to XXX". No matter how often I rebuild the solution, it doesn't get better.
The cure:
- Close VS .NET
- Delete the .ncb file (in the same directory as the solution) - it contains the data used for intellisense
- Delete all the output files (dll's, exe's)
- Delete all the obj directory - I think this is the real problem
- Rebuild all and test to see that intellisense now works.
- Go make a cup of tea and relax.
With a spot of luck Google will find this entry next time intellisense breaks on me.
(just in case search on other phrases Intellisense broken)