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ASP.NET 4.0 Charting - How can one display a explanatory message in the chart area when the databound query returns no results?

I have a .Net 4 Chart Control bound to stored proc. For some customer selected queries the chart will be empty. I would like to display a "No data" message in the empty charting area so customers understand why the chart is empty. I haven't been able to find any information about how to do this.

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