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Gets or sets how invalid formulas are handled when opening a workbook. Default is Throw.
public InvalidFormulaHandling InvalidFormulaHandling { get; set; }
Public Property InvalidFormulaHandling As InvalidFormulaHandling
XlsxOpenOptions options = new XlsxOpenOptions();
options.InvalidFormulaHandling = InvalidFormulaHandling.Discard;
InvalidFormulaHandling invalidFormulaHandling = options.InvalidFormulaHandling;
workbook.Open("path/to/workbook.xlsx", options);