WPF

System.Threading.ThreadStart threadstartdelegate = delegate()
           {
               for (int i = 0; i < 100; i++)
               {
                   System.Threading.Thread.Sleep(1000);
                   OnlineClientListBoxItem item = new OnlineClientListBoxItem();
                   item.SetUserDetails(Name: "Client " + i.ToString(), Userid: i);

                   lstbOnlineClients.Dispatcher.Invoke(new Action<OnlineClientListBoxItem>((x) =>
                       {
                           lstbOnlineClients.Items.Add(x);
                       }), System.Windows.Threading.DispatcherPriority.Normal, item);
               }
           };
           System.Threading.Thread mainThread = new System.Threading.Thread(threadstartdelegate);
           mainThread.SetApartmentState(System.Threading.ApartmentState.STA);
           mainThread.Start();

<ListView x:Name="InnerListView"  
          ScrollViewer.HorizontalScrollBarVisibility="Disabled" 
          x:FieldModifier="public" 
          BorderBrush="Black" BorderThickness="1" 
          ItemsSource="{Binding}" >
    <ListView.View>
        <GridView>
            <GridViewColumn Width="100" Header="Downloads" />
        </GridView>
    </ListView.View>
    <ListView.ItemTemplate>
        <DataTemplate>
            <DockPanel >
                <Grid DockPanel.Dock="Right" >
                    <Label Grid.Column="1" Content="{Binding Path=WpfDownloads}" />
                </Grid>

InnerListView.DataContext = myList;

EditWindow frm = new EditWindow();
frm.Owner = this;
frm.DataContext = ListView1.SelectedValue;
frm.ShowDialog();