public class Font : Xceed.Workbooks.NET.StyleBase<IReadonlyFont>, IReadonlyFont  

using( var workbook = Workbook.Create( "test.xlsx" ) )
 {
   // Get the first worksheet. A workbook contains at least 1 worksheet.
   var cellWorksheet = workbook.Worksheets[ 0 ];

   // Add a title.
   cellWorksheet.Cells[ "B1" ].Value = "Set Fonts";
   cellWorksheet.Cells[ "B1" ].Style.Font = new Font() { Bold = true, Size = 15.5d };

   // Set cell content and Font styles.
   cellWorksheet.Cells[ "C5" ].Value = "Bold, Italic and Underline";
   cellWorksheet.Cells[ "C5" ].Style.Font = new Font() { Bold = true, Italic = true, Underline = true, UnderlineType = UnderlineType.Double };

   cellWorksheet.Cells[ "C8" ].Value = "Bold and red Broadway";
   cellWorksheet.Cells[ "C8" ].Style.Font.Bold = true;
   cellWorksheet.Cells[ "C8" ].Style.Font.Color = System.Drawing.Color.Red;
   cellWorksheet.Cells[ "C8" ].Style.Font.Name = "Broadway";

   cellWorksheet.Cells[ "C12" ].Value = "Strikethrough and size 18";
   cellWorksheet.Cells[ "C12" ].Style.Font = new Font() { Strikethrough = true, Size = 18d };

   cellWorksheet.Cells[ "C15" ].Value = "Superscript";
   cellWorksheet.Cells[ "C15" ].Style.Font = new Font() { Superscript = true };

   cellWorksheet.Cells[ "D15" ].Value = "Subscript";
   cellWorksheet.Cells[ "D15" ].Style.Font = new Font() { Subscript = true };

   // Add a second worksheet for rows.
   var rowWorksheet = workbook.Worksheets.Add( "Rows" );

   // Set row content and font.
   rowWorksheet.Cells[ 5, 3 ].Value = "Setting row font to Elephant and Orange";
   rowWorksheet.Cells[ 5, 11 ].Value = "Another content";
   rowWorksheet.Rows[ 5 ].Style.Font = new Font() { Name = "Elephant", Color = System.Drawing.Color.Orange };

   // Add a third worksheet for column.
   var columnWorksheet = workbook.Worksheets.Add( "Columns" );

   // Set column content and font.
   columnWorksheet.Cells[ 5, 5 ].Value = "Setting column font to Lucida, Underline and Italic";
   columnWorksheet.Cells[ 11, 5 ].Value = "Another content";
   columnWorksheet.Columns[ 5 ].Style.Font = new Font() { Name = "Lucida Fax", Italic = true, Underline = true, UnderlineType = UnderlineType.Double };

   // Save workbook to disk.
   workbook.Save();
 }