silverlight 双击事件

<StackPanel x:Name="st_De" MouseLeftButtonDown="MouseDoubleEvent" Background="Blue"/>

 private void MouseDoubleEvent(object sender, MouseButtonEventArgs e)
        {
            if (e.ClickCount == 2)
            {
                MessageBox.Show(e.ClickCount.ToString());
            }
        }

<StackPanel x:Name="st_De" MouseLeftButtonDown="MouseDoubleEvent" Background="Blue"/>