Hi,
Thank you for your interest in Essential XlsIO.
Use the following code to read computed Formula Value.
sheet.Range["C1"].FormulaNumberValue
Here is a sample for your reference
Sample:
http://websamples.syncfusion.com/samples/XlsIO.Windows/F63587/main.htmKindly take a look and let us know if this helps.
Regards,
Ajish.