We have an issue with Resharper C++ include directory detection. It does not include directories (listed under Public Project Content) of the referenced project.
Here is the image of the referenced project VC++ Directories configuration:
Visual Studio's IntelliSense correctly detects header from the project Foo, however with Resharper enabled it does not. Note that it builds correctly.
Here is the minimal example uploaded under ID: 2020_12_09_ELavzpv2BDpd8jfG