Shrlalgo.RvKits/WPFluent/Controls/TabControl/TabControl.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Style TargetType="{x:Type TabControl}">
        <Setter Property="Foreground" Value="{DynamicResource TextFillColorPrimaryBrush}" />
        <Setter Property="Background" Value="{DynamicResource SubtleFillColorTransparentBrush}" />
        <Setter Property="BorderBrush" Value="{DynamicResource CardStrokeColorDefaultBrush}" />
        <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" x:Name="RowDefinition0" />
                            <RowDefinition Height="*" x:Name="RowDefinition1" />
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" x:Name="ColumnDefinition0" />
                            <ColumnDefinition Width="*" x:Name="ColumnDefinition1" />
                        </Grid.ColumnDefinitions>

                        <TabPanel
                            Background="Transparent"
                            Grid.Column="0"
                            Grid.Row="0"
                            IsItemsHost="True"
                            KeyboardNavigation.TabIndex="1"
                            Margin="0"
                            Panel.ZIndex="1"
                            x:Name="HeaderPanel" />

                        <Border
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="0,1,0,0"
                            CornerRadius="0,4,4,4"
                            Grid.Column="1"
                            Grid.Row="1"
                            KeyboardNavigation.DirectionalNavigation="Contained"
                            KeyboardNavigation.TabIndex="2"
                            KeyboardNavigation.TabNavigation="Local"
                            x:Name="Border">
                            <ContentPresenter
                                ContentSource="SelectedContent"
                                HorizontalAlignment="Stretch"
                                Margin="0"
                                TextElement.Foreground="{TemplateBinding Foreground}"
                                VerticalAlignment="Stretch"
                                x:Name="PART_SelectedContentHost" />
                        </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="TabStripPlacement" Value="Top">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0" />
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0" />
                            <Setter Property="Grid.ColumnSpan" TargetName="HeaderPanel" Value="2" />
                            <!--<Setter TargetName="Border" Property="Grid.Row" Value="1" />
                            <Setter TargetName="Border" Property="Grid.Column" Value="0" />
                            <Setter TargetName="Border" Property="Grid.ColumnSpan" Value="2" />
                            <Setter TargetName="Border" Property="BorderThickness" Value="0,1,0,0" />
                            <Setter TargetName="Border" Property="CornerRadius" Value="0,4,4,0" />-->
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Bottom">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1" />
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0" />
                            <Setter Property="Grid.ColumnSpan" TargetName="HeaderPanel" Value="2" />
                            <!--<Setter TargetName="Border" Property="Grid.Row" Value="0" />
                            <Setter TargetName="Border" Property="Grid.Column" Value="0" />
                            <Setter TargetName="Border" Property="Grid.ColumnSpan" Value="2" />
                            <Setter TargetName="Border" Property="BorderThickness" Value="0,0,0,1" />
                            <Setter TargetName="Border" Property="CornerRadius" Value="4,4,0,0" />-->
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Left">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0" />
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0" />
                            <Setter Property="Grid.RowSpan" TargetName="HeaderPanel" Value="2" />
                            <!--<Setter TargetName="Border" Property="Grid.Row" Value="0" />
                            <Setter TargetName="Border" Property="Grid.Column" Value="1" />
                            <Setter TargetName="Border" Property="Grid.RowSpan" Value="2" />
                            <Setter TargetName="Border" Property="BorderThickness" Value="1,0,0,0" />
                            <Setter TargetName="Border" Property="CornerRadius" Value="0,4,4,0" />-->
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Right">
                            <Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0" />
                            <Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1" />
                            <Setter Property="Grid.RowSpan" TargetName="HeaderPanel" Value="2" />
                            <!--<Setter TargetName="Border" Property="Grid.Row" Value="0" />
                            <Setter TargetName="Border" Property="Grid.Column" Value="0" />
                            <Setter TargetName="Border" Property="Grid.RowSpan" Value="2" />
                            <Setter TargetName="Border" Property="BorderThickness" Value="0,0,1,0" />
                            <Setter TargetName="Border" Property="CornerRadius" Value="4,0,0,4" />-->
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style TargetType="{x:Type TabItem}">
        <Setter Property="Background" Value="{DynamicResource LayerOnMicaBaseAltFillColorTransparentBrush}" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="HorizontalAlignment" Value="Stretch" />
        <Setter Property="VerticalAlignment" Value="Stretch" />
        <Setter Property="VerticalContentAlignment" Value="Stretch" />
        <Setter Property="HorizontalContentAlignment" Value="Stretch" />
        <Setter Property="FocusVisualStyle" Value="{DynamicResource DefaultControlFocusVisualStyle}" />
        <Setter Property="KeyboardNavigation.IsTabStop" Value="True" />
        <Setter Property="Focusable" Value="True" />
        <Setter Property="OverridesDefaultStyle" Value="True" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TabItem}">
                    <Grid x:Name="Root">
                        <Border
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            CornerRadius="8,8,0,0"
                            Margin="0"
                            MinHeight="36"
                            MinWidth="80"
                            Padding="6"
                            x:Name="Border">
                            <ContentPresenter
                                ContentSource="Header"
                                HorizontalAlignment="Left"
                                Margin="0"
                                RecognizesAccessKey="True"
                                VerticalAlignment="Center"
                                x:Name="ContentSite" />
                        </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter Property="Panel.ZIndex" Value="100" />
                            <Setter Property="Background" TargetName="Border" Value="{DynamicResource SolidBackgroundFillColorTertiaryBrush}" />
                            <Setter Property="BorderBrush" TargetName="Border" Value="{DynamicResource CardStrokeColorDefaultBrush}" />
                            <Setter Property="Foreground" Value="{DynamicResource TextFillColorPrimaryBrush}" />
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Top">
                            <Setter Property="Grid.Row" TargetName="Border" Value="1" />
                            <Setter Property="Grid.Column" TargetName="Border" Value="0" />
                            <Setter Property="Grid.ColumnSpan" TargetName="Border" Value="2" />
                            <!--<Setter TargetName="Border" Property="BorderThickness" Value="1,1,1,0" />-->
                            <Setter Property="CornerRadius" TargetName="Border" Value="4,4,0,0" />
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Bottom">
                            <Setter Property="Grid.Row" TargetName="Border" Value="0" />
                            <Setter Property="Grid.Column" TargetName="Border" Value="0" />
                            <Setter Property="Grid.ColumnSpan" TargetName="Border" Value="2" />
                            <!--<Setter TargetName="Border" Property="BorderThickness" Value="0,0,0,1" />-->
                            <Setter Property="CornerRadius" TargetName="Border" Value="0,0,4,4" />
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Right">
                            <Setter Property="Grid.Row" TargetName="Border" Value="0" />
                            <Setter Property="Grid.Column" TargetName="Border" Value="1" />
                            <Setter Property="Grid.RowSpan" TargetName="Border" Value="2" />
                            <!--<Setter TargetName="Border" Property="BorderThickness" Value="1,0,0,0" />-->
                            <Setter Property="CornerRadius" TargetName="Border" Value="0,4,4,0" />
                        </Trigger>
                        <Trigger Property="TabStripPlacement" Value="Left">
                            <Setter Property="Grid.Row" TargetName="Border" Value="0" />
                            <Setter Property="Grid.Column" TargetName="Border" Value="0" />
                            <Setter Property="Grid.RowSpan" TargetName="Border" Value="2" />
                            <!--<Setter TargetName="Border" Property="BorderThickness" Value="0,0,1,0" />-->
                            <Setter Property="CornerRadius" TargetName="Border" Value="4,0,0,4" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</ResourceDictionary>