The ImageBrush's content is tiled in this example
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Microsoft.Samples.Graphics.UsingImageBrush.TilingExample" >
<Grid Margin="20">
<Rectangle Name="tileRectangle" Grid.Row="3" Grid.Column="1" Width="150" Height="150" Stroke="LimeGreen" StrokeThickness="1" HorizontalAlignment="Left">
<Rectangle.Fill>
<ImageBrush Viewport="0,0,50,50" ViewportUnits="Absolute" TileMode="Tile" AlignmentX="Left" AlignmentY="Top" ImageSource="c:\image.jpg" />
</Rectangle.Fill>
</Rectangle>
</Grid>
</Page>
Related examples in the same category