WPF 4 DataGrid与WPFToolkit February 2010 (Version 3.5.50211.1)的模板列双向绑定

WPF 4 中DataGrid的模板列做双向数据绑定时，需要在绑定中指定UpdateSourceTrigger，如下：（WPFToolkit February 2010）

<DataGrid VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Recycling" Name="dataGrid1" AutoGenerateColumns="False" ItemsSource="{Binding}" HorizontalGridLinesBrush="{DynamicResource GridLinesBrush}" VerticalGridLinesBrush="{DynamicResource GridLinesBrush}" AlternatingRowBackground="{DynamicResource RowBackgroundBrush}" CanUserAddRows="False" CanUserResizeRows="False" CanUserDeleteRows="False" IsEnabled="True" Margin="0" RowHeight="20"  CellStyle="{DynamicResource DataGridCellStyle2}" ColumnHeaderStyle="{DynamicResource DataGridColumnHeaderStyle1}" RowStyle="{DynamicResource DataGridRowStyle1}" RowHeaderStyle="{DynamicResource DataGridRowHeaderStyle1}" ItemsPanel="{DynamicResource ItemsPanelTemplate1}" RowHeaderWidth="0" IsSynchronizedWithCurrentItem="True" SelectionMode="Single" MinWidth="10" BorderThickness="0" GridLinesVisibility="Horizontal" ColumnHeaderHeight="22" ScrollViewer.CanContentScroll="False" >
	<DataGrid.Columns>
		<DataGridTemplateColumn Header="选择" CanUserReorder="False">
			<DataGridTemplateColumn.CellTemplate>
				<DataTemplate>
          <CheckBox IsChecked="{Binding IsChecked, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Cursor="Hand"/>
				</DataTemplate>
		    </DataGridTemplateColumn.CellTemplate>
		</DataGridTemplateColumn>
		<DataGridTextColumn Header="标题" Binding="{Binding Title, Mode=OneWay}" />
  </DataGrid.Columns>
</DataGrid>

IsChecked="{Binding IsChecked, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

WPFToolkit February 2010则不需要。