add basic code

src/Shared/HandyControl_Shared/Themes/Styles/Base/TabControlBaseStyle.xaml

@@ -9,7 +9,7 @@
         <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
         <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
         <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
-        <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource TitleBrush}"/>
         <Setter Property="Margin" Value="0"/>
         <Setter Property="Padding" Value="{StaticResource DefaultControlPadding}"/>
         <Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}"/>