Gets or sets the location of a detailed description of the chart.
A String value specifying the URL for the file that contains a detailed description for the chart.
The DescriptionUrl property specifies an HTML file that provides additional details for the chart. The DescriptionUrl property renders as the longdesc attribute for the web chart. If this property is not set, or is set to an empty string (""), the chart is rendered without the longdesc attribute. Use the DescriptionUrl property to supplement the ChartControlSettings.AlternateText property.