In the Visual Studio .NET Core project, there is no bower_components folder, like you might expect based on the previous chapters. Visual Studio has its own way of doing things. Search for bowerrc in the Solution Explorer, and open the file you found. The file should have the following code:
{ "directory": "wwwroot/lib"}
What this means is that the wwwroot/lib is the bower_components folder. Twirl it open to see that this is indeed the case. Once you do this, it should be easy to find the lib/bootstrap/scss path, with all the Bootstrap 4 SCSS partial files present.
