string strXml = "\<ChartPoints\>
    <Point ProductCode="1234568" Qty="112.00" />
    <Point ProductCode="SCRT0410AA" Qty="234.00" />
    <Point ProductCode="CCRA5410TQ" Qty="253.00" />
    </ChartPoints>"

    var doc = new System.Xml.XmlDocument { InnerXml = strXml };
    XmlChartData.Document = doc;
    XmlChartData.XPath = "ChartPoints/Point";