The default build action has been changed from "None" to "Content", as I understand to support Visual Studio publish/deploy.
For a particular project, I do not use the Visual Studio publish/deploy method, nor need to compile from the command line.
Setting build action to "Compile" still seems to compile, with the added benefit of compile-time errors and warnings being generated for any coding mistakes in the cshtml.
This seems like a huge benefit over the usual runtime-only errors.
If I change the build action to "Compile", does anyone know what issues I will run into later?
Many thanks..
edit: I am not sure what future issues I might run into, other than VS deployment, or commandline compilation, but for safety, I went for the precompile option marcind mentions in his comment. I marked that as the closest answer.