visual studio intellisense not working solution
If your Visual Studio intellisense is not working on some class files, when typing a DOT ( . ) after the object name no properties / methods are shown or autocomplete feature stopped working all of the sudden. Then here are some possible solutions.
Check if your application have some error(s) which you are ignoring. If you have already fixed the error(s) then try cleaning the project. You can clean the project by right clicking on your application solution name and selecting "Clean".
In visual studio 2005 Professional edition, select the class file properties and change the "Build Action" to "Compile".
One of the above solutions should solve the problem.