// ** - You Should do it in all Cells //BorderAround: Medium** worksheet.get_Range("b5", "b5").Cells.BorderAround(Missing.Value, Excel.XlBorderWeight.xlMedium, Excel.XlColorIndex.xlColorIndexAutomatic, ColorTranslator.ToOle(Color.FromArgb(255, 192, 0))); worksheet.get_Range("b6", "b6").Cells.BorderAround(Missing.Value, Excel.XlBorderWeight.xlMedium, Excel.XlColorIndex.xlColorIndexAutomatic, ColorTranslator.ToOle(Color.FromArgb(255, 192, 0))); worksheet.get_Range("b10", "b10").Cells.BorderAround(Missing.Value, Excel.XlBorderWeight.xlMedium, Excel.XlColorIndex.xlColorIndexAutomatic, ColorTranslator.ToOle(Color.FromArgb(255, 192, 0)));
source share