Question

I’m trying to align a tabcontrol strip on the right.

Just to be clear – I want the tabs on the top (tabstripplacement), but aligned on the right.

Answer 1

The Headers for the TabItem‘s are located in a panel of type TabPanel. We can add HorizontalAlignment="Right" for it in the Resources of TabControl

<TabControl ...>
    <TabControl.Resources>
        <Style TargetType="TabPanel">
            <Setter Property="HorizontalAlignment" Value="Right"/>
        </Style>
    </TabControl.Resources>
    <!--...-->
</TabControl>