I see from Microsoft\'s documentation that I can access the particular border edges of a cell using the \'xlBordersIndex\' property and for example set the border style for
Microsoft.Office.Interop.Excel.Range tRange = xlWorkSheet.UsedRange; tRange.Borders.LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous; tRange.Borders.Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;