最简单的silverlight的DataGrid行双击事件添加

最简单的silverlight的DataGrid行双击事件添加
本人看了很多的行双击事件，觉得都太负载，如：用Timer
，Thread等，于是自己决定写一个简单的，如下

this.DataGrid1.LoadingRow += Grid_LoadingRow;

private void Grid_LoadingRow(object sender, DataGridRowEventArgs e)
{
    e.Row.MouseLeftButtonUp += Row_MouseLeftButtonUp;
}

private void Row_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
            TimeSpan t = DateTime.Now.TimeOfDay;
            if (this.DataGrid1.Tag != null)
            {
                TimeSpan oldT = (TimeSpan)this.DataGrid1.Tag;
                if ((t - oldT) < TimeSpan.FromMilliseconds(300))
                {
                    MessageBox.Show("xxx");
                }
            }
            this.DataGrid1.Tag = t;
}