<Style  TargetType="{x:Type TabControl}">
  <Setter Property="OverridesDefaultStyle" Value="True" />
  <Setter Property="SnapsToDevicePixels" Value="True" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type TabControl}">
        <Grid KeyboardNavigation.TabNavigation="Local">
          <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
          </Grid.RowDefinitions>
          <TabPanel 
            Name="HeaderPanel"
            Grid.Row="0"
            Panel.ZIndex="1" 
            Margin="0,0,4,-1" 
            IsItemsHost="True"
            KeyboardNavigation.TabIndex="1"
            Background="Transparent" />
          <Border 
            Name="Border" 
            Grid.Row="1" 
            Background="{StaticResource WindowBackgroundBrush}" 
            BorderBrush="{StaticResource SolidBorderBrush}" 
            BorderThickness="1" 
            CornerRadius="2" 
            KeyboardNavigation.TabNavigation="Local"
            KeyboardNavigation.DirectionalNavigation="Contained"
            KeyboardNavigation.TabIndex="2" >
            <ContentPresenter 
              Name="PART_SelectedContentHost"
              Margin="4"
              ContentSource="SelectedContent" />
          </Border>
        </Grid>
        <ControlTemplate.Triggers>
          <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}" />
            <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource DisabledBorderBrush}" />
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>