实现效果

 

 XMAL样式

<Window.Resources><!--  TabItem的样式  --><Style TargetType="{x:Type TabItem}"><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="{x:Type TabItem}"><Grid><!--  主Border  --><BorderName="bd"Cursor="Hand"Margin="2,3,2,3"Background="{TemplateBinding Background}"BorderBrush="Gray"BorderThickness=".5"CornerRadius="7"><ContentPresenterMargin="10,5"VerticalAlignment="Center"ContentSource="Header" /></Border></Grid><ControlTemplate.Triggers><Trigger Property="IsSelected" Value="True"><Setter TargetName="bd" Property="BorderThickness" Value="1" /><Setter TargetName="bd" Property="Margin" Value="0" /></Trigger><Trigger Property="IsMouseOver" Value="True" /></ControlTemplate.Triggers></ControlTemplate></Setter.Value></Setter><Setter Property="Foreground" Value="Black" /><Setter Property="FontSize" Value="12" /></Style><!--  TabControl的样式  --><Style TargetType="{x:Type TabControl}"><Setter Property="Template"><Setter.Value><ControlTemplate TargetType="{x:Type TabControl}"><Grid><Grid.RowDefinitions><RowDefinition Height="Auto" /><RowDefinition Height="*" /></Grid.RowDefinitions><Border Padding="10"><TabPanel IsItemsHost="True" /></Border><BorderGrid.Row="1"Padding="10"BorderBrush="Gray"BorderThickness="2"><ContentPresenter Name="PART_SelectedContentHost" ContentSource="SelectedContent" /></Border></Grid></ControlTemplate></Setter.Value></Setter></Style><!--#endregion-->
</Window.Resources>