Retrieving list data in SilverLight

Retrieving list data in SilverLight
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 Microsoft.SharePoint.Client;
namespace Microsoft.SDK.SharePointServices.Samples
{
public partial class MainPage : UserControl
{
Web oWebsite;
ListCollection collList;
IEnumerable listInfo;
public MainPage()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
ClientContext clientContext = ClientContext.Current;
oWebsite = clientContext.Web;
ListCollection collList = oWebsite.Lists;
clientContext.Load(oWebsite,
website=>website.Title);
listInfo = clientContext.LoadQuery(
collList.Include(
list=>list.Title,
list=>list.Fields.Include(
field=>field.Title).Where(
field=>field.Required == true
&& field.Hidden != true)));
clientContext.ExecuteQueryAsync(onQuerySucceeded, onQueryFailed);
}
private void onQuerySucceeded(object sender, ClientRequestSucceededEventArgs args)
{
UpdateUIMethod updateUI = DisplayInfo;
this.Dispatcher.BeginInvoke(updateUI);
}
private void onQueryFailed(object sender, ClientRequestFailedEventArgs args)
{
MessageBox.Show = "Request failed. " + args.Message + "\n" + args.StackTrace;
}
private void DisplayInfo()
{
MyOutput.Text = "Title: " + oWebsite.Title;
collList = oWebsite.Lists;
foreach (List oList in listInfo)
{
MyOutput.Text += "\n\tList: " + oList.Title;
FieldCollection collField = oList.Fields;
foreach (Field oField in collField)
{
MyOutput.Text += "\n\t\tField: " + oField.Title;
}
}
}
private delegate void UpdateUIMethod();
}
}