ShrlAlgoToolkit/WPFluent/Controls/Card/Card.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:controls="clr-namespace:WPFluent.Controls"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Thickness x:Key="CardPadding">14,16,14,16</Thickness>
    <Thickness x:Key="CardBorderThemeThickness">1</Thickness>

    <Style TargetType="{x:Type controls:Card}">
        <Setter Property="Background" Value="{DynamicResource CardBackgroundFillColorDefaultBrush}" />
        <Setter Property="Foreground" Value="{DynamicResource TextFillColorPrimaryBrush}" />
        <Setter Property="BorderBrush" Value="{DynamicResource CardStrokeColorDefaultBrush}" />
        <Setter Property="BorderThickness" Value="{StaticResource CardBorderThemeThickness}" />
        <Setter Property="Padding" Value="{StaticResource CardPadding}" />
        <Setter Property="HorizontalAlignment" Value="Stretch" />
        <Setter Property="VerticalAlignment" Value="Center" />
        <Setter Property="HorizontalContentAlignment" Value="Stretch" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />
        <Setter Property="FontWeight" Value="Normal" />
        <Setter Property="Border.CornerRadius" Value="{DynamicResource ControlCornerRadius}" />
        <Setter Property="Focusable" Value="False" />
        <Setter Property="KeyboardNavigation.IsTabStop" Value="False" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <Setter Property="OverridesDefaultStyle" Value="True" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:Card}">
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="*" />
                            <RowDefinition Height="Auto" />
                        </Grid.RowDefinitions>

                        <Border
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            CornerRadius="{TemplateBinding Border.CornerRadius}"
                            HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
                            Padding="{TemplateBinding Padding}"
                            VerticalAlignment="{TemplateBinding VerticalAlignment}"
                            x:Name="ContentBorder">
                            <ContentPresenter
                                HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                                x:Name="ContentPresenter" />
                        </Border>

                        <Border
                            Background="{DynamicResource CardBackgroundFillColorSecondaryBrush}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="1"
                            CornerRadius="0,0,4,4"
                            Grid.Row="1"
                            Padding="{TemplateBinding Padding}"
                            Visibility="Collapsed"
                            x:Name="FooterBorder">
                            <ContentPresenter Content="{TemplateBinding Footer}" x:Name="FooterContentPresenter" />
                        </Border>
                    </Grid>

                    <ControlTemplate.Triggers>
                        <Trigger Property="HasFooter" Value="True">
                            <Setter Property="Visibility" TargetName="FooterBorder" Value="Visible" />
                            <Setter Property="CornerRadius" TargetName="ContentBorder" Value="4,4,0,0" />
                            <Setter Property="BorderThickness" TargetName="ContentBorder" Value="1,1,1,0" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>


</ResourceDictionary>