Thank you for this, but there seems to be an issue. The compiler is complaining about two missing references (local:NullToBooleanConverter and local:GroupHeaderButton). "local" is mapped to
"clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.ScheduleView" of course.
I am using what I believe to be the latest version of the assemblies (version 2011 2.712.1040)...is it possible this resource dictionary is from a newer, as yet unreleased, version of the control?
Also, is it possible to get the Metro theme for the GridView as well? We are customizing the behavior there too.