Prevent "Formulas have been recalculated, save" dialog?

How can I prevent the "Formulas have been recalculated, save" dialog that is launched by Excel interop when quitting the开发者_运维问答 app?

xlApp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);

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Try setting the Workbook.Saved property to true before attempting to close the workbook.