<Window.Resources>

    <Style x:Key="aa" TargetType="Control">

        <Setter Property="Background" Value="Wheat"/>

        <Setter Property="Template">

            <Setter.Value>

                <ControlTemplate TargetType="Control">

                    <Grid>

                        <TextBlock Text="汤姆" Background="Wheat"/>

                    </Grid>

                </ControlTemplate>

            </Setter.Value>

        </Setter>

    </Style>

    <Style x:Key="bb" TargetType="Control">

        <Setter Property="Template">

            <Setter.Value>

                <ControlTemplate TargetType="Control">

                    <Grid>

                        <Grid.RowDefinitions>

                            <RowDefinition/>

                            <RowDefinition/>

                            <RowDefinition/>

                        </Grid.RowDefinitions>

                        <TextBlock Text="张三" Background="Red"/>

                        <TextBlock Text="李四" Grid.Row="1" Background="Yellow"/>

                        <Control Style="{StaticResource aa}" Grid.Row="2" Background="Wheat"/>

                    </Grid>

                </ControlTemplate>

            &