Trying to translate a C# snippet (to use itextsharp to convert an html file to a pdf) into powershell

I'm trying to use the iTextSharp library to convert an html doc to a pdf and found a useful C# snippet here itextsharp-to-rescue-converting-html:

try
{
 // set the file name
 string file = "C:/pdf/MyPdf.pdf";
 // create a pdf document
 Document document = new Document();
 // set the page size, set the orientation
 document.SetPageSize(PageSize.A4);
 // create a writer instance
 PdfWriter pdfWriter = PdfWriter.GetInstance(document, new FileStream(file, FileMode.Create));
 // open the document
 document.Open();
 // define fonts
 Font titleFont = FontFactory.GetFont("Helvetica", 14, Font.BOLD, new iTextSharp.text.BaseColor(0, 179, 212));
 Font textFont = FontFactory.GetFont("Helvetica", 9, Font.NORMAL, BaseColor.BLACK);
 // create a paragraph and add it to the document
 Paragraph title = new Paragraph("This PDF-document was created using iTextSharp!");
 title.Font = titleFont;
 title.IndentationLeft = 50f;
 document.Add(title);
 // add line below title
 LineSeparator line = new LineSeparator(1f, 100f, BaseColor.BLACK, Element.ALIGN_CENTER, -1);
 document.Add(new Chunk(line));
 // html pagina inlezen
 string htmlText = File.ReadAllText(Server.MapPath("~/template.html")); 
 // html pagina parsen in een arraylist van IElements
 List< IElement > htmlElements = HTMLWorker.ParseToList(new StringReader(htmlText), null);
 // add the IElements to the document
 for (int i = 0; i < htmlElements.Count; i++)
 {
  // cast the element
  IElement htmlElement = ((IElement)htmlElements[i]);
  document.Add(htmlElement);
 }
 // close the document
 document.Close();
 // open the pdf document
 Process.Start(file);
}
catch (Exception ex)
{
 lblError.Text = "An error ocurred, the PDF-document could not be created.
Exception: " + ex.Message;
}

The trouble is that I'm way not a programmer and there's a lot here I can't figure out.

I don't know where LineSeparator is. its not iTextSharp.text.LineSeparator. I don't know how to access it.

I'm not asking for someone to write my script for me, but maybe point me in the right direction?

So far I have this:

[System.Reflection.Assembly]::LoadFrom("C:\itextsharp\itextsharp.dll")

#create doc object
$Doc = New-Object iTextSharp.text.Document

#set page size
$Doc.SetPageSize([iTextSharp.text.PageSize]::A4)

#Get html file
$Stream = [IO.File]::OpenWrite("C:\test\test.html")

#creat pdfwrite object
$Writer = [itextsharp.text.pdf.PdfWriter]::GetInstance($Doc, $Stream)

#open document
$Doc.Open()

#Define fonts
$TitleFont = [iTextSharp.text.FontFactory]::GetFont("Helvetica", 14, [iTextSharp.text.Font]::BOLD, (New-Object iTextSharp.text.BaseColor -ArgumentList @(0, 179, 212)))
$TextFont = [iTextSharp.text.FontFactory]::GetFont("Helvetica", 9, [iTextSharp.text.Font]::NORMAL, [iTextSharp.text.BaseColor]::BLACK)

#create a paragraph and add it to the document
$Title = New-Object iTextSharp.text.Paragraph -ArgumentList @(,"This is the title?")
$Title.Font = $TitleFont
$Title.IndentationLeft = 0x50f
#Add title paragraph to doc object
$doc.Add($Title) 

#add line below title
$LineSeparator = New-Object iTextSharp.text.???