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Gets an instance of IBorders which represents the borders of this conditional format.
Use the returned IBorders object to configure the border style that is applied when this above-average conditional formatting rule evaluates to true.
IBorders Borders { get; }
ReadOnly Property Borders As IBorders
worksheet.Range["A1:A5"].Value = new object[,] {{10}, {20}, {30}, {40}, {50}};
IAboveAverage format = worksheet.Range["A1:A5"].FormatConditions.AddAboveAverage();
format.Interior.Color = Color.Yellow;
IBorders borders = format.Borders;
borders.Color = Color.Red;