Finding databinding listbox

This is the example :
http://i683.photobucket.com/albums/vv194/only_forever_love_9x/1-3.jpg

http://i683.photobucket.com/albums/vv194/only_forever_love_9x/2-3.jpg

http://i683.photobucket.com/albums/vv194/only_forever_love_9x/3-2.jpg

How can i do ? I don't have any ideas about .xaml and xaml.cs code. I need help ! How can I save Iolated Storage - Read and Save "Find,News,ListBox" in Page1

MyDoc.cs
public class MyDoc : INotifyPropertyChanged
  {
  public int Id
  {
  get;
  set;
  }
  public MyDoc()
  {
  }
  private string _private;
  public string Private
  {
  get
  {
  return _private;
  }
  set
  {
  if (_private != value)
  {
  _private = value;
  NotifyPropertyChanged("Private");
  }
  }
  }
  private string _public;
  public string Public
  {
  get
  {
  return _public;
  }
  set
  {
  if (_public != value)
  {
  _public = value;
  NotifyPropertyChanged("Public");
  }
  }
  }

  public event PropertyChangedEventHandler PropertyChanged;
  private void NotifyPropertyChanged(String propertyName)
  {
  PropertyChangedEventHandler handler = PropertyChanged;
  if (null != handler)
  {
  handler(this, new PropertyChangedEventArgs(propertyName));
  }
  }
  }
MyFind
public class MyFind : INotifyPropertyChanged
  {
  public int Id
  {
  get;
  set;
  }
  public MyFind()
  {
  }
  private string _find;
  public string Find
  {
  get
  {
  return _find;
  }
  set
  {
  if (_find != value)
  {
  _find = value;
  NotifyPropertyChanged("Find");
  }
  }
  }
  private string _news;
  public string News
  {
  get
  {
  return _news;
  }
  set
  {
  if (_news != value)
  {
  _news = value;
  NotifyPropertyChanged("News");
  }
  }
  }
  private ObservableCollection _list;
  public ObservableCollection List
  {
  get
  {
  if (_list == null)
  {
  _list = new ObservableCollection();
  }
  return _list;
  }
  set
  {
  if (_list != value)
  {
  _list = value;
  NotifyPropertyChanged("List");
  }
  }
  }
  public event PropertyChangedEventHandler PropertyChanged;
  private void NotifyPropertyChanged(String propertyName)
  {
  PropertyChangedEventHandler handler = PropertyChanged;
  if (null != handler)
  {
  handler(this, new PropertyChangedEventArgs(propertyName));
  }
  }
  }