aistudio-wpf-diagram/Others/Dragablz/DragablzDemo/App.xaml

<Application x:Class="DragablzDemo.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:dragablz="clr-namespace:Dragablz;assembly=Dragablz"
             >
    <Application.Resources>
        <Style TargetType="{x:Type dragablz:DragablzItem}" BasedOn="{StaticResource {x:Type dragablz:DragablzItem}}" x:Key="CustomDragablzItemStyle">
            <Style.Setters>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Border BorderThickness="{TemplateBinding Border.BorderThickness}" Padding="{TemplateBinding Control.Padding}" BorderBrush="{TemplateBinding Border.BorderBrush}" Background="{TemplateBinding Panel.Background}" SnapsToDevicePixels="True">
                                <Grid>
                                    <Grid.RowDefinitions>
                                        <RowDefinition />
                                        <RowDefinition />
                                        <RowDefinition />
                                    </Grid.RowDefinitions>
                                    <Border Background="Cyan"  x:Name="PART_DragableElement">
                                        <TextBlock>DH</TextBlock>
                                    </Border>
                                    <Thumb Grid.Row="1" Width="30" Height="30" Background="Yellow" x:Name="PART_Thumb" />
                                    <ContentPresenter Grid.Row="2" Content="{TemplateBinding ContentControl.Content}" ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" ContentStringFormat="{TemplateBinding ContentControl.ContentStringFormat}" HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
                                </Grid>
                            </Border>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style.Setters>
        </Style>
        
        <Style TargetType="{x:Type dragablz:TabablzControl}" x:Key="BasicExamplesTabStyle">
            <Setter Property="Margin" Value="8 8 8 8" />
            <Setter Property="HeaderPrefixContent" Value="☺" />
            <Setter Property="HeaderSuffixContent" Value="☻" />
            <Setter Property="HeaderSuffixContentTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <TextBlock Text="☻" ToolTip="You can easily insert content here using HeaderSuffixContent" Margin="2 0 2 0"/>
                    </DataTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Application.Resources>
</Application>