✅ VS/Docker ignoring code changes

othervisual studioasp.net

I've got an ASP.NET project in Visual Studio with a dockerfile generated by VS. Somehow I am now experiencing problems with VS ignoring changes to files I am making, not recompiling properly and instead just using outdated versions of a .dll. I tried deleting the docker image, a Clean and Rebuild in VS, to no avail. When debugging it just opens up the old code as a "Miscellaneous File".