using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using Bytescout.XLS;

namespace HelloWorld
{
class Program
{
static void Main(string[] args)
{
// Create new XLSDocument
XLSDocument document = new XLSDocument();

// Add new worksheet
Worksheet worksheet = document.WorkBook.Worksheets.Add("HelloWorld");

// Create array with font names
string[] fontNames = new string[] {
"Helvetica",
"Times New Roman",
"Verdana",
"Times New Roman"
};

// Use all fonts in fontsNames array
for (int i = 0; i < fontNames.Length; i++)
{
// Set font size based on loop counter
float fontSize = 10 + i * 3;

//Set cell font type and font size
worksheet.Cell(i, 0).Font = new System.Drawing.Font(fontNames[i], fontSize);

// Set cell value
worksheet.Cell(i, 0).Value = fontNames[i];
}

// Save document
document.SaveAs("Fonts.xls");

// Close document
document.Close();

// open generated XLS document in default program
Process.Start("Fonts.xls");
}
}
}

Download example source code: bytescoutxls_different_fonts_for_cells.zip (8 KB)