WPF TileMode ViewPort ImageBrush VisualBrush

<Window x:Class="WpfApp98.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp98"
        WindowState="Maximized"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Background>
        <ImageBrush TileMode="FlipXY"
                    Viewport="0,0,0.2,0.2">
            <ImageBrush.ImageSource>
                <BitmapImage UriSource="D:\C\WpfApp98\WpfApp98\Images\1.jpg"/>
            </ImageBrush.ImageSource>
        </ImageBrush>
    </Window.Background>
    <!--<Window.Background>
        <VisualBrush TileMode="FlipXY"
                     Viewport="0,0,0.5,0.5">
            <VisualBrush.Visual>
                <Button>OK</Button>
            </VisualBrush.Visual>
        </VisualBrush>
    </Window.Background>-->
    <!--<DockPanel>
        <StackPanel Margin="10"
                    x:Name="stackPanel">
            <Button>Button</Button>
            <CheckBox>CheckBox</CheckBox>
        </StackPanel>
        <Rectangle>
            <Rectangle.Fill>
                <VisualBrush TileMode="FlipXY"
                             Viewport="0,0,0.5,0.5"
                             Visual="{Binding ElementName=stackPanel}"/>
            </Rectangle.Fill>
        </Rectangle>
    </DockPanel>-->
</Window>

 

 

 

 

 

 

 

 

 

 

 

 

 <Window.Background>
     <VisualBrush TileMode="FlipXY"
                  Viewport="0,0,0.5,0.5">
         <VisualBrush.Visual>
             <Button>OK</Button>
         </VisualBrush.Visual>
     </VisualBrush>
 </Window.Background>