Wpf checkboxlist

<Window x:Class="WpfTests.CheckedListBox"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         Title="CheckedListBox" Height="300" Width="300">    <ListBox ItemsSource="{Binding TheList}">       <ListBox.ItemTemplate>          <DataTemplate>             <CheckBox IsChecked="{Binding IsSelected}" Content="{Binding TheText}"/>          </DataTemplate>       </ListBox.ItemTemplate>    </ListBox> </Window>

 
using System; using System.Windows; using System.Collections.Generic; using System.Collections.ObjectModel;  namespace WpfTests {    public partial class CheckedListBox : Window    {       public ObservableCollection<BoolStringClass> TheList{ get; set; }              public CheckedListBox()       {          InitializeComponent();           TheList = new ObservableCollection<BoolStringClass>();          TheList.Add(new BoolStringClass { IsSelected = true, TheText = "Some text for item #1" });          TheList.Add(new BoolStringClass { IsSelected = false, TheText = "Some text for item #2" });          TheList.Add(new BoolStringClass { IsSelected = false, TheText = "Some text for item #3" });          TheList.Add(new BoolStringClass { IsSelected = false, TheText = "Some text for item #4" });          TheList.Add(new BoolStringClass { IsSelected = false, TheText = "Some text for item #5" });          TheList.Add(new BoolStringClass { IsSelected = true, TheText = "Some text for item #6" });          TheList.Add(new BoolStringClass { IsSelected = false, TheText = "Some text for item #7" });           this.DataContext = this;       }    }     public class BoolStringClass    {       public string TheText { get; set; }       public bool IsSelected { get; set; }    } }