WPF ListBox添加新数据时自动滚到最后一行

Xaml 文件代码如下：

    <ListBox
        x:Name="lstBox"
        Height="200"
        AlternationCount="100000"
        ItemsSource="{Binding Logs}">
      <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding RelativeSource={RelativeSource AncestorType=ListBoxItem}, Path=(ItemsControl.AlternationIndex)}" />
                    <TextBlock Text="{Binding}" />
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

Code:

	//每增加一条触发滚动动作
      ((INotifyCollectionChanged)lstBox.Items).CollectionChanged += (s, e) =>
        {
            lstBox.SelectedIndex = lstBox.Items.Count - 1;
            lstBox.ScrollIntoView(lstBox.SelectedItem);
        };