一个简单的TabItem样式。

<SolidColorBrush x:Key="TabItemDisabledBackground" Color="#F4F4F4"/>
<SolidColorBrush x:Key="TabItemDisabledBorderBrush" Color="#FFC9C7BA"/>

<Style  TargetType="{x:Type TabItem}">
<!--<Setter Property="FocusVisualStyle" Value="{x:null}"/>-->
<Setter Property="Foreground" Value="#333333"/>
<Setter Property="FontSize" Value="16"/>
<Setter Property="BorderBrush" Value="{StaticResource TabControlNormalBorderBrush}"/>
<Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid SnapsToDevicePixels="true" Height="40" MinWidth="110">
<Path Margin="0 0 0 -12" x:Name="PATH" Visibility="Collapsed" Data="M0.5,0.5 L109.5,0.5 109.5,39.5 64,40 57,51 49,40 0.5,39.5 z" Fill="#FF0FAF46"  Height="51.5"  Stretch="Fill" Stroke="Transparent"  Width="110"/>
<Border x:Name="Bd" Background="#dfe9f6">
<ContentPresenter Margin="5 0 5 0" x:Name="Content" ContentSource="Header" HorizontalAlignment="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Top"/>
</MultiTrigger.Conditions>
<Setter Property="Visibility" Value="visible" TargetName="PATH"/>
<Setter Property="Foreground" Value="White"></Setter>
<Setter Property="Background" Value="#FF0FAF46" TargetName="Bd"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemDisabledBackground}"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource TabItemDisabledBorderBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>