title: Exception when creating new XFont. PDFSharp Xamarin
body: <p>When i debugging my app I got Exception when creating object of XFont. Any idea what is wrong? 
  In all examples I found on github etc. it was exactly like in this code below.</p>
  
  <blockquote>
    <p>System.TypeInitializationException: 'The type initializer for
    'PdfSharpCore.Utils.FontResolver' threw an exception.'</p>
  </blockquote>
  
  <pre><code>document.Info.Title = "created with pdfsharp";
  
  // Create an empty page
  PdfPage page = document.AddPage();
  
  // Get an XGraphics object for drawing
  XGraphics gfx = XGraphics.FromPdfPage(page);
  
  // Create a font
  XFont font = new XFont("Verdana", 20, XFontStyle.BoldItalic);
  
  // Draw the text
  gfx.DrawString("Test of PdfSharp on Android", font, 
                  new XSolidBrush(XColor.FromArgb(0, 0, 0)), 
                  10, 130);
  // Save the document...
  document.Save(Path.Combine(Path.GetTempPath(), Name));
  </code></pre>