Read original post by Long Zheng at IStartedSomething
While designing and developing MetroTwit for Windows 8, I grew very close to StandardStyles.xaml (BFF) – one of the files Visual Studio 2012 automatically pre-populates for a Metro-style application.
The resource file provides some of the core and standardized XAML control styles for a consistent Windows 8 app user experience. In the RTM version of Visual Studio released earlier this week,StandardStyles was updated to provide a more comprehensive dictionary of AppBar button styles. It grew from tens to hundreds.