I’m working windows phone 7 app which loads an image inside a HyperlinkButton. This works great, except for the Stretch="Uniform" causes white space to be put around the image when it is not perfectly square. Is there a way to make this transparent?

<HyperlinkButton NavigateUri="{Binding Id, StringFormat='{}/x;component/Pages/FullScreenImage.xaml?id={0}'}"
Grid.Column="0" Grid.Row="0"
toolkit:TiltEffect.IsTiltEnabled="True" Background="Transparent">
<HyperlinkButton.Template>
<ControlTemplate TargetType="HyperlinkButton">
<Grid Margin="0,0,0,10" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Grid.Column="0"
Grid.Row="0"
Text="Advertised"
Margin="10,0,0,0"
Style="{StaticResource PhoneTextSubtleStyle}" />
<Image Grid.Column="0"
Grid.Row="1"
Margin="0"
Stretch="Uniform"
Source="{Binding ExpectedImage}" />
</Grid>
</ControlTemplate>
</HyperlinkButton.Template>
</HyperlinkButton>
My image source is creating the white. :-/