VS Community 2022 17.10.3, a tiny console project (One file console app and one DLL with just an empty class skeleton). The project worked.
Now, I use Google Drive as my working drive. All of my documents are stored there, and I feel safe that even if my local drive fails, my files are still on the cloud. So, using “Tools/Options/Projects and Solutions/Project Locations,” I moved the project location to “drive” K, the drive created by Google Drive.
The build fails with an exception in CreateAppHost: “System.IO.IOException: The requested operation cannot be performed on a file with a user-mapped section open.”
I returned the location to %HomePath%\source\repos, and it’s working again!