A Reusable WPF Autocomplete TextBox (Part 2)

namespace Test
{
  using System;
  using System.Diagnostics;
  using System.IO;
  using System.Windows;
  using System.Xml.Serialization;

  using Aviad.WPF.Controls;

  /// <summary>
  /// Interaction logic for Window1.xaml
  /// </summary>
  public partial class Window1 : Window
  {
    public Window1()
    {
      this.InitializeComponent();

      ViewModel vm = this.Resources["vm"] as ViewModel;

      if (vm != null)
      {
        try
        {
          if (System.IO.File.Exists(this.SettingsFileName))
          {
            // Create a new file stream for reading the XML file
            using (FileStream readFileStream = new FileStream(this.SettingsFileName, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
              // Create a new XmlSerializer instance with the type of the test class
              XmlSerializer serializerObj = new XmlSerializer(typeof(ViewModel));

              // Load the object saved above by using the Deserialize function
              ViewModel viewModel = (ViewModel)serializerObj.Deserialize(readFileStream);

              ((ViewModel)this.Resources["vm"]).SuggestEntries = viewModel.SuggestEntries;

              // Cleanup
              readFileStream.Close();
            }
          }
        }
        catch (Exception exp)
        {
          Debug.Print(exp.ToString());
        }
      }
    }

    private string SettingsFileName
    {
      get
      {
        return System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
                                      "ACTBFolderSettings.xml");
      }
    }

    protected override void OnClosed(EventArgs e)
    {
      base.OnClosed(e);

      ViewModel vm = this.Resources["vm"] as ViewModel;

      if (vm != null)
      {
        if (vm.SuggestEntries.Count > 0)
        {
          try
          {
            // Create a new file stream to write the serialized object to a file
            using (TextWriter writeFileStream = new StreamWriter(this.SettingsFileName))
            {
              // Create a new XmlSerializer instance with the type of the test class
              XmlSerializer serializerObj = new XmlSerializer(typeof(ViewModel));

              serializerObj.Serialize(writeFileStream, vm);

              writeFileStream.Close(); // Cleanup
            }
          }
          catch (Exception exp)
          {
            Debug.Print(exp.ToString());
          }
        }
      }
    }

    /// <summary>
    /// A hyperlink has been clicked. Start a web browser and let it browse to where this points to...
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void Hyperlink_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
    {
      Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri));
      e.Handled = true;
    }
  }
}