WPF

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Windows.Threading;
using System.Windows;

namespace MyNamespace
{
  /// <summary>
  /// This class is responsible for updating the time so that it displays propertly in the status bar.
  /// </summary>
  public class TimeManager : INotifyPropertyChanged, IDisposable
  {
    private DispatcherTimer _timer = null;
    private string _currentDateAndTime;

    /// <summary>
    /// Initialize a new instance of <see cref="TimeManager"/>.
    /// </summary>
    /// <param name="parent">The window that "owns" the status bar. This class uses the Dispatcher from that
    /// window.</param>
    public TimeManager(Window parent)
    {
      _timer = new DispatcherTimer(TimeSpan.FromSeconds(1), DispatcherPriority.Normal, new EventHandler(TimerTick), parent.Dispatcher);
    }

    /// <summary>
    /// Called when the timer updates.
    /// </summary>
    protected virtual void TimerTick(object sender, EventArgs e)
    {
      CurrentDateAndTime = DateTime.Now.ToString();
    }

    /// <summary>
    /// Called when the item updates.
    /// </summary>
    /// <param name="propertyName">The name of the property.</param>
    protected virtual void Changed(string propertyName)
    {
      if (PropertyChanged != null)
      {
        PropertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
      }
    }

    /// <summary>
    /// Get or set the current date and time.
    /// </summary>
    public string CurrentDateAndTime
    {
      get
      {
        return _currentDateAndTime;
      }
      set
      {
        if (_currentDateAndTime != value)
        {
          _currentDateAndTime = value;
          Changed("CurrentDateAndTime");
        }
      }
    }
    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    #endregion

    /// <summary>
    /// Start the timer.
    /// </summary>
    internal void Start()
    {
      if (_timer != null)
        _timer.Start();
    }

    /// <summary>
    /// Stop the timer.
    /// </summary>
    private void Stop()
    {
      if (_timer != null)
        _timer.Stop();
    }


    #region IDisposable Members

    public void Dispose()
    {
      Dispose(true);
    }

    private bool _disposed = false;
    protected virtual void Dispose(bool dispose)
    {
      if (!_disposed && dispose)
      {
        Stop();
        _disposed = true;
        GC.SuppressFinalize(this);
      }
    }
    #endregion
  }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace MyNamespace
{
    /// <summary>
    /// Interaction logic for StatusBar.xaml
    /// </summary>
    public partial class StatusBar : UserControl
    {
        private TimeManager _timeManager = null;

        /// <summary>
        /// Initializes a new instance of <see cref="StatusBar"/>.
        /// </summary>
        public StatusBar()
        {
            InitializeComponent();
        }

        /// <summary>
        /// Called once the control has loaded. We need to hook into this event rather than
        /// the constructor to set up the key manager.
        /// </summary>
        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            DependencyObject parent = this.Parent;

            while (parent != null && !(parent is Window))
                parent = LogicalTreeHelper.GetParent(parent);

            if (parent != null)
            {
                _timeManager = new TimeManager(parent as Window);
                TimePortion.DataContext = _timeManager;
                _timeManager.Start();
            }

        }

        /// <summary>
        /// When the control is unloading, we want to remove the time manager.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void UserControl_Unloaded(object sender, RoutedEventArgs e)
        {
            if (_timeManager != null)
            {
                _timeManager.Dispose();
            }
        }
    }
}

function onSilverlightError(sender, args) {<br />
<br />
    var appSource = "";<br />
    if (sender != null && sender != 0) {<br />
        appSource = sender.getHost().Source;<br />
    } <br />
    var errorType = args.ErrorType;<br />
    var iErrorCode = args.ErrorCode;<br />
    ...<br />
    ...

<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%"><br />
    <param name="source" value="ClientBin/SilverlightApplication2.xap"/><br />
    <param name="onerror" value="onSilverlightError" /><br />
    <param name="background" value="white" /><br />
    <param name="minRuntimeVersion" value="2.0.31005.0" /><br />
    <param name="autoUpgrade" value="true" /><br />
    <a href="http://go.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;"><br />
        <img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none"/><br />
    </a><br />
</object>