Silverlight ListBox and the ItemContainerStyle

Stretching out the Listbox content.
 
In order to get the content of my Listbox ItemTemplate to fill out the entire width of the Listbox control, I simply needed to add an ItemContainerStyle as follows:
 

<UserControl.Resources>

    <Style x:Key="ListBoxItemStyle1" TargetType="ListBoxItem">

        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>

        <Setter Property="HorizontalAlignment" Value="Stretch"/>

    </Style>

</UserControl.Resources>

 
The solution came from here…

External and Local Resources in App.xaml

The property ‘Resource’ is set more than once.
 
Working on my Silverlight application that contained local and external resources I was getting the error (above) in the App.xaml file. The error was displayed even thought the build was successful and my application ran. I found the solution to my problem here.