I would like to know if I can safely delete the sdf file that stores information for Visual Studios Intellisense - is it going to be rebuilt the next time that I open the so
The short answer is yes, you can safely delete the .sdf file.
However, note that you can actually prevent VS from creating .sdf files in the first place by setting the following option to True:
True
Tools -> Options -> Text Editor -> C/C++ -> Advanced -> Disable Database