<Window x:Class="WpfTemplates.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="TamplateViewer (XAML-format)" Height="337" Width="488" Name="win">
    <Grid Name="mainGrid">
        <Grid.RowDefinitions>
            <RowDefinition Height="50*" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="50*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="40*" />
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="60*" />
        </Grid.ColumnDefinitions>
        <GridSplitter Grid.Column="1" Grid.RowSpan="3"
                      HorizontalAlignment="Center" VerticalAlignment="Stretch" Width="5"/>
        <GridSplitter Grid.Column="2" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Center" Height="5"/>
        <!--Кнопка, изображение которой хочу задать фоном для ряда следующих контролов-->
        <Button Content="Источник фона..." HorizontalAlignment="Stretch" Margin="5" Name="button1" VerticalAlignment="Stretch" />
        <!--Первый подопытный кролик: ContentControl-->
        <ContentControl Name="contentControl" Grid.Column="2" Content="ContentControl" 
                        BorderBrush="Red" BorderThickness="5" Margin="5">
            <ContentControl.Background>
                <VisualBrush Visual="{Binding ElementName=button1}"/>
            </ContentControl.Background>
        </ContentControl>
        <!--Второй подопытный кролик: TextBlock-->
        <TextBlock Name="xamlCode" Grid.Column="2" Grid.Row="2">
            <TextBlock.Background>
                <VisualBrush Visual="{Binding ElementName=button1}"/>
            </TextBlock.Background>
        </TextBlock>
    </Grid>
</Window>

<Window x:Class="WpfTreeBrowser.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Обозреватель визуального дерева интерфейсных элементов WPF" Width="500" Height="300" Background="Azure">
    <Grid Width="200" Height="200" Background="Aqua" />
</Window>