public BorderCollection Borders {get;}

var workbook = Workbook.Create( "test.xlsx" )



// Get first worksheet.

var worksheet = workbook.Worksheets[ 0 ];



// Set cells content.

worksheet.Cells[ "B15" ].Value = 0.1;



worksheet.Cells[ "C15" ].Value = 0.22;

worksheet.Cells[ "B16" ].Value = 0.31;

worksheet.Cells[ "C16" ].Value = 0.5;

worksheet.Cells[ "B17" ].Value = 0.36;

worksheet.Cells[ "C17" ].Value = 0.25;



// Get CellRange from B15 to C17 and modify the Borders of the 6 cells.

var cellRange = worksheet.Cells[ "B15", "C17" ];

cellRange.Style.Borders.SetInside( LineStyle.Medium, Color.DarkGreen );

cellRange.Style.Borders.SetOutline( LineStyle.Medium, Color.DarkGreen );



// Save workbook to disk.

workbook.Save();