Why can't _ViewStart.cshtml access the ViewBag object?

Question

I have the default _ViewStart.cshtml in my /Views folder. I\'d like to be able to access my ViewBag object so I can set the default title for all my views.

However,

Answer 1

Its not 100% clean but see a workaround using PageData or a bit of enumeration at:

How do I set ViewBag properties on _ViewStart.cshtml?