Windows 8 Development: Do <CommandBar> work in Windows8.

Question

I don't know what is wrong with the code.Is it some LAME error or environment problems.
Since, i m using <Page.BottomAppBar> to put a AppBar.
Within that XAML tag, when i put <CommandBar> then it show some red-line error (not defined).
Though, its alternative <AppBar>  is working fine in that.

In MSDN, it is written that WIndows8.1 is Minimum Support Client for this class. And, by the fact I'm using Windows 8 (not 8.1)

So, My question is: Does CommandBar support my Windows 8 device or i have to use that AppBar ?