The HTML designer supports the ability to select an element
or control in design-view, and graphically select a rule from the CSS list to
apply to it.
You'll also find when in source mode that you now have
intellisense support for specifying CSS class rules:
Figure 9
This is true for both HTML element (like above), as well as
with ASP.NET server controls:
Figure 10
This CSS intellisense is supported in both regular HTML /
ASP.NET pages, as well as when working with pages based on master pages and
nested master pages.