Stretch = UniformToFill
<Window x:Class="Chapter05.ImageBrushExample" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Chapter05" Height="300" Width="300"> <StackPanel Margin="5" Grid.Column="1" Grid.Row="1"> <TextBlock Margin="5" Text="Stretch = UniformToFill" /> <Button Width="135" Height="100"> <Button.Background> <ImageBrush ImageSource="c:\image.jpg" Stretch="UniformToFill" /> </Button.Background> </Button> </StackPanel> </Window>