Installing:
Web Standards Update for Microsoft Visual Studio 2010 SP1
also makes VS remember CSS 3.0 validation setting.
Web Standards Update provides the much wanted HTML5 & CSS3 support to
Visual Studio 2010 SP1. It brings VS 2010 intellisense & validation as
close to W3C specification as we could get via means of an extension.
The most notable supported features by this extension are:
HTML5 – Video, Audio, Input Type, Drag & Drop, WAI-ARIA, Microdata,
Schema.org Browser API – GeoLocation & Local Storage CSS3 – 2D
Transforms, 3D Transforms, Animations, Background & Borders, Basic Box
Model, Basic UI, Behavior, Color, Flexible Box Layout, Fonts, Paged
Media, Hyperlink Presentation, Line, Lists, Marquee, Media Queries,
Multi Column, Namespaces, Presentation Levels, Ruby, Selectors,
Speech, Syntax, Template Layout, Text & Transitions. It also supports
vendor specific prefixes like –ms, -webkit & -moz.