xml - Update ItemsControl when XmlDataProvider source is changed -


i have itemcontrol setup scroll text rss feed. rss feed external xml document being read items control, , contents of rss feed scrolled across screen see on 24-hour news station. 

    <resourcedictionary>         <xmldataprovider x:key="rss" source="\...\rss\rss.xml" >     </resourcedictionary>...      <itemscontrol datacontext="{binding source={staticresource rss}, xpath=/rss/channel}" itemssource="{binding xpath=items}" >      <itemscontrol.datatemplate>       <!-- data template -->      </itemscontrol.datatemplate>     </itemscontrol>

what know how can refresh itemssource binding, or content being displayed, when external xml changed?


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