Here's what I have so far.
When the phone is vertical:
When the phone is horizontal:
Here's my XAML markup:
<StackPanel Margin="19 0 19 5">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="110" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Image Grid.Column="0" Source="{Binding ImageUrl}"
Stretch="Uniform"
Margin="0 10 0 10"/>
<StackPanel Grid.Column="1" Margin="14 0 0 0">
<TextBlock Text="{Binding Title}"
FontSize="30" />
<TextBlock Text="{Binding ReleaseDate}"
FontSize="22"
Foreground="#E0A655"/>
<TextBlock Text="{Binding Synopsis}"
FontSize="22"
TextWrapping="Wrap"/>
</StackPanel>
</Grid>
<Line StrokeThickness="4" Stroke="#434343" X1="0" X2="350"
Y1="13" Y2="13" />
</StackPanel>
I'd like a line that is the same width as it currently is, but centered. But also when the phone is horizontal, the line should be a bit bigger to address the wider space available to it.
Is this possible?
You can have that kind of sizing by using margin to size your content instead of positions.
If that's not possible with a Line (I haven't really checked), you might try to use a 1 pixel high (or 4 rather) Rectangle.
EDIT: with a code snippet:
<Line HorizontalAlignment="Stretch" Margin="50, 10, 50, 10" Stroke="Black" StrokeThickness="4" />