FastUpToDateCheck in VS doesn't account for changes solely to .Views.dll. This causes referencing projects to be treated as
up to date even though a referenced project rebuilt. Touch the marker file to cause referenced projects to rebuild.
Fixes https://github.com/aspnet/Razor/issues/2306
to cause it to treat
Gives our generated a files an extension that isn't used for any other
purpose (that we know of). This is handy for tooling to be able to
quickly know if a file is 'ours'. This comes up in places like
IVsSymbolicNavigationNotify (go to definition).
Pranav K
Ajay Bhargav Baaskaran
Ryan Nowak