reactive/Rx.NET/Samples/Portable/SilverlightApplication/MainPage.xaml

<UserControl x:Class="SilverlightApplication.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">
    <Grid.RowDefinitions>
      <RowDefinition Height="auto" />
      <RowDefinition Height="*" />
      <RowDefinition Height="auto" />
      <RowDefinition Height="*" />
    </Grid.RowDefinitions>

    <TextBlock Text="Observable 1:" Grid.Row="0"/>
    <ListBox x:Name="list1" Grid.Row="1" />

    <TextBlock Text="Observable 2:" Grid.Row="2"/>
    <ListBox x:Name="list2" Grid.Row="3" />

  </Grid>
</UserControl>