IntelliSense failure in C++ projects

 To approach IntelliSense failure in C++ projects

1. Make sure your Visual C++ project contains no compilation errors.If your project is a Makefile project, see How to: Enable IntelliSense for Makefile Projects.

2. Make sure that stdafx.h is in the include path. For more information about include paths in Visual C++ projects, see #include and /I.

3. If your solution contains a combination of the Managed Extensions for C++ and the new syntax for managed C++, then separate your solution into multiple solutions based on the syntax type.

4. If none of the preceding steps help resolve IntelliSense failure, then there might be an error in the .ncb file for your solution.Copy the .ncb file and contact product support services. For more information about how to contact Microsoft for technical support, see Getting Help from Microsoft Product Support Services (Visual Studio).Regenerate the .ncb file for your solution.To regenerate .ncb filesDelete the .ncb file from your solution. //删除.ncb文件后问题得以解决Rebuild your solution.//重新生成The development environment automatically regenerates a new .ncb file for your solution.