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Gets the reading order of the associated range object as it is displayed in the current user interface.
This value reflects the displayed format of the range and can differ from the corresponding IRange property when the displayed result is affected by formatting such as conditional formatting or table styles.
ReadingOrder ReadingOrder { get; }
ReadOnly Property ReadingOrder As ReadingOrder
IRange range = worksheet.Range["A1"];
range.Value = "Test";
range.ReadingOrder = ReadingOrder.RightToLeft;
ReadingOrder readingOrder = range.DisplayFormat.ReadingOrder;