Chequered bitmap

GridBitmap.cs

public static class GridBitmap
{
    public static Bitmap Create(int repeatX, int repeatY, Size bitmapSize, Color foreground, Color background)
    {
        // Check for division by zero
        if (repeatX == 0 || repeatY == 0)
            throw new ArgumentException("Division by zero.");

        Bitmap bmp = new Bitmap(bitmapSize.Width, bitmapSize.Height);
        Graphics g = Graphics.FromImage(bmp);
        Brush fgBrush = new SolidBrush(foreground);
        g.Clear(background);

        SizeF size = new SizeF((float)bmp.Width / repeatX, (float)bmp.Height / repeatY);
        for (int x = 0; x < repeatX; x += 2)
        {
            for (int y = 0; y < repeatY; ++y)
            {
                g.FillRectangle(fgBrush, (x + (y % 2)) * size.Width, y * size.Height, size.Width, size.Height);
            }
        }

        g.Dispose();
        return bmp;
    }
}