[HaBo]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Pivot;
using System.Windows.Browser;

namespace SilverlightApplication14
{
    public partial class MainPage : UserControl
    { 
       public MainPage()
        {
            InitializeComponent();
            Pivot.LoadCollection("http://content.getpivot.com/collections/amg/Top_Movies.cxml", string.Empty);
        }
    
    }
}

<UserControl x:Class="SilverlightApplication14.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:Pivot="clr-namespace:System.Windows.Pivot;assembly=System.Windows.Pivot">



    <Grid x:Name="LayoutRoot" Background="White">

        <Pivot:PivotViewer x:Name="Pivot"/>

    </Grid>

</UserControl>