Dear,
Binding 'Header' property to DataContext in a GridVewColumnGroup doesn't work. Public property is not requested to DataContext.
<telerik:GridViewColumnGroup Name="RangeColumn" Header="{Binding FirstDependencyName, FallbackValue=Nothing}" />
By other hand, a binding to StaticResource works property.
<telerik:GridViewColumnGroup Name="RangeColumn" Header="{Binding Source={StaticResource appResx}, Path=btn_Create}" />
In next example, public property is requested to DataContext (value is received tested with a converter), but surprisingly it is not displayed.
<telerik:GridViewColumnGroup Name="RangeColumn">
<telerik:GridViewColumnGroup.Header>
<TextBlock Text="{Binding FirstDependencyName, FallbackValue=Nothing}"/>
</telerik:GridViewColumnGroup.Header>
</telerik:GridViewColumnGroup>
Thank you