please read
     http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001OR.
     
     <p>The <code>Sparkline</code> class implements the <code>IListItemRenderer</code>
     and <code>IDropInListItemRenderer</code>, thereby allowing it to be
     used as an item renderer in a list control or a data grid.  The class
     also supports standalone instances.</p>
            <p></p><br/><hr></div><a name="propertySummary"></a><div class="summarySection"><div class="summaryTableTitle">Public Properties</