Abaikan peringatan OpenXML

 
                IgnoredErrors ignoredErrors = new IgnoredErrors();
                IgnoredError ignoredError = new IgnoredError()
                {
                    SequenceOfReferences = new ListValue<StringValue> { InnerText = "A:Z" },
                    NumberStoredAsText = true
                };
                ignoredErrors.Append(ignoredError);
                worksheetPart.Worksheet.Append(ignoredErrors);
                sheets.Append(sheet);
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