New Post: newbie question: compiler errors

I am a new user and have just installed the toolkit binaries plus samples. I have:

1) created a test project
2) added references to 'Xceed.Wpf.Toolkit.dll' and 'Xceed.Wpf.DataGrid.dll', and
3) added the check list box sample files HomeView.xaml and NavigationView.xaml.

The compiler generates an error message that it cannot find the tag 'DemoView'. Many of the sample windows are derived from 'DemoView' but I am unable to determine which assembly contains this class. Where can I find it?

Thanks,

Ian