The mystery of the disappearing Publish Profiles

For some reason my Visual Studio wasn’t showing an existing profile that someone else had created on the Project | Publish menu. This was despite the file showing in Solution Explorer as being part of the project.

As I was using dotnet I could have used the command line and that would likely have worked e.g.

dotnet publish -p:PublishProfile=MyProfile

However what actually worked for me was to simply delete the bin and obj folders for the project concerned.