MS .NET Chart: how to turn point labels on/off

There is no property to turn on or off the visibility of data point labels (i.e. something called enabled or so). The following trick works: make the color transparent if you don’t want to see the labels. Here is some code that works for me:

        private void FlipLabels(Series s)
        {
            if (s.LabelForeColor == System.Drawing.Color.Transparent)
            {
                s.LabelForeColor = System.Drawing.Color.Black;
                s.SmartLabelStyle.CalloutLineColor = System.Drawing.Color.Black;
            }
            else
            {
                s.LabelForeColor = System.Drawing.Color.Transparent;
                s.SmartLabelStyle.CalloutLineColor = System.Drawing.Color.Transparent;
            }
        }

See also: http://social.msdn.microsoft.com/Forums/en-US/MSWinWebChart/threads/

Update: too bad I can not change the line style to arrows in a line chart. See: http://social.msdn.microsoft.com/Forums/en-US/MSWinWebChart/thread/01b61a40-203d-45dd-8834-7e8f49b974c7/.