PDFSharp解析富文本字符串

我使用richtextbox创建文本块，并将它们保存到数据库中。在那之后，我尝试创建一个带有字符串的PDF。

我的问题是，我找不到在PDF中显示格式化字符串的方法，它显示每个<p等，而不是正确使用它们。如果PDFsharp不可能，还有其他可能性吗？

 // Create a new PDF document
 PdfDocument document = new PdfDocument();
 // Create an empty page            
 PdfPage oPage = document.AddPage();
 // Get an XGraphics object for drawing
 XGraphics gfx = XGraphics.FromPdfPage(oPage);
 //Drawing Images and Rectangles and other things

 //sText is just an example of what my DB string looks like 
 string sText = "<p>Here you can see formattet text<'p> 'n 
 always multiple rows and some  g&uuml;  or /r"

 gfx.DrawString(sText, NormalText, XBrushes.Black, new XRect(XUnit.FromCentimeter(3.2), XUnit.FromCentimeter(16.35), oPage.Width, oPage.Height), null);

 // Send PDF to browser
 MemoryStream stream = new MemoryStream();
 document.Save(stream, false);
 Response.Clear();
 Response.ContentType = "application/pdf";
 Response.AddHeader("content-length", stream.Length.ToString());
 Response.BinaryWrite(stream.ToArray());
 Response.Flush();
 stream.Close();
 Response.End();