Custom grid style in Silverlight 4 - silverlight

Question

I want to set background of a grid using a style. I style I'm setting the Background Property of the grid.
But I have a border filled with LinearGradientFill and a Path which also has LinearGradientFill in it.
But I'm not able to combine both.
Below is sample code. I want to create it as a style.
<Grid>
<Border BorderBrush="Black" BorderThickness="2">
<Border.Background>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
<GradientStop Color="Black" Offset="0.953" />
<GradientStop Color="White" Offset="0" />
</LinearGradientBrush>
</Border.Background>
</Border>
<Path Data="M 0,0 C 0,620 10,10 560,0" Height="60" VerticalAlignment="Top">
<Path.Fill>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
<GradientStop Color="Black" Offset="0" />
<GradientStop Color="White" Offset="0.779" />
</LinearGradientBrush>
</Path.Fill>
</Path>
</Grid>
It gives me an error as:
The Property 'Value' is set more than once.

Answer 1

Archie,
You need to use a Template in order to place arbitrary XAML into a Style. Unfortuately, only Controls have Templates, and Grids and Borders are not Controls. But there is a solution. Although not as clean as you would like, the following XAMl should accomplish your goal. You paste the following XAML into Charles Petzold's XAML Cruncher to see the results:
<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="400">
<UserControl.Resources>
<!-- A ContentControl template that defines your background -->
<ControlTemplate x:Key="BackgroundTemplate" TargetType="ContentControl">
<Grid>
<Border BorderBrush="Black" BorderThickness="2">
<Border.Background>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
<GradientStop Color="Black" Offset="0.953" />
<GradientStop Color="White" Offset="0" />
</LinearGradientBrush>
</Border.Background>
</Border>
<Path Data="M 0,0 C 0,620 10,10 560,0" Height="60" VerticalAlignment="Top">
<Path.Fill>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
<GradientStop Color="Black" Offset="0" />
<GradientStop Color="White" Offset="0.779" />
</LinearGradientBrush>
</Path.Fill>
</Path>
</Grid>
</ControlTemplate>
<!-- A ContentControl Style that references the background template -->
<Style x:Key="BackgroundStyle" TargetType="ContentControl">
<Setter Property="Template" Value="{StaticResource BackgroundTemplate}" />
</Style>
</UserControl.Resources>
<!-- Typical usage; place the background ContentControl behind your body content -->
<Grid x:Name="LayoutRoot">
<ContentControl Style="{StaticResource BackgroundStyle}" />
<TextBlock Text="Your Content" Foreground="Red" FontSize="36" HorizontalAlignment="Center" VerticalAlignment="Center" />
</Grid>
</UserControl>