When you add new items to the LegendData object the legend may become too long to
display in the control window or image. This is why you may wish to alter the legend
layout strategy or in other words the way the legend expands when new items are added.
Example
The following example instructs the legend to expand to a limited number of rows.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2