I am seeing some very strange behavior. In the attached workbook, cell B1726 on the Input sheet has formula =B1725. In memory in my C# program, after CalculateFormula is called for the workbook, I can see the DoubleVal…...15” to the generated XLSX file for double value...9999999999999998E-17 ” to the generated XLSX file instead of “ 1.0E-16...