//page setup
var document = new Document();

style = document.Styles["Heading1"];
style.Font.Name = "Clarendon LT Bold";
style.Font.Size = 20;
style.Font.Color = Color.FromRgbColor((byte)255, Color.Parse("0x43545E"));
style.Font.Bold = true;

//page content
var sec = document.AddSection();

var p = sec.AddParagraph("Title In Clarendon", "Heading1");
p.AddLineBreak();

p = sec.AddParagraph("Normal stuff here, in Arial");
p.Style = "Normal";


//render
byte[] bytes;

var pdf = new PdfDocument();

var options = new XPdfFontOptions(PdfFontEmbedding.Always);
var font = new XFont("Clarendon LT Bold", 20, XFontStyle.Regular, options);
var docRenderer = new DocumentRenderer(doc);

docRenderer.PrepareDocument();
for (int p = 1; p <= docRenderer.FormattedDocument.PageCount; p++)
{
       var page = pdf.AddPage();
       page.Size = PdfSharp.PageSize.Letter;

       var g = XGraphics.FromPdfPage(page);
       DrawPageHeader(ref docRenderer, ref pdf, g);//draw in a header graphic

       docRenderer.RenderPage(g, p);
}

using (var ms = new MemoryStream())
{
       pdf.Save(ms, true);
       bytes = ms.ToArray();
}

return bytes;

gfx.MUH = PdfFontEncoding.Unicode;
gfx.MFEH = PdfFontEmbedding.Default;