title: itextsharp how to add a full line break
body: <p>I use itextsharp and i need to draw a dotted linebreak from left to right of the page(100% width) but don't know how. The doc always has a margin left right. Please help <img src="https://i.stack.imgur.com/o0IdE.jpg" alt="enter image description here"></p>
  
  <pre><code>var pageSize = PageSize.A4;
  
          if (_pdfSettings.LetterPageSizeEnabled)
          {
              pageSize = PageSize.LETTER;
          }
  
  
          var doc = new Document(pageSize);
          PdfWriter.GetInstance(doc, stream);
          doc.Open();
  
          //fonts
  
          var titleFont = GetFont();
          titleFont.SetStyle(Font.BOLD);
          titleFont.Color = BaseColor.BLACK;
          titleFont.Size = 16;
  
          var largeFont = GetFont();
          largeFont.SetStyle(Font.BOLD);
          largeFont.Color = BaseColor.BLACK;
          largeFont.Size = 18;
  
          int ordCount = orders.Count;
          int ordNum = 0;
  
          foreach (var order in orders)
          {
  
              var addressTable = new PdfPTable(3);
              addressTable.WidthPercentage = 100f;
              addressTable.SetWidths(new[] { 25, 37, 37 });
  
  
              // sender address
  
              cell = new PdfPCell();
              //cell.Border = Rectangle.NO_BORDER;
              cell.AddElement(new Paragraph("Người Gửi", titleFont));
              cell.AddElement(new Paragraph(_localizationService.GetResource("admin.orders.pdfinvoice.sender", lang.Id), smallFont));
              cell.AddElement(new Paragraph(_localizationService.GetResource("admin.orders.pdfinvoice.senderaddress", lang.Id), smallFont));
              cell.AddElement(new Paragraph(_localizationService.GetResource("PDFInvoice.Hotline", lang.Id), smallFont));
              cell.AddElement(new Paragraph("TAKARA.VN", largeFont));
  
              addressTable.AddCell(cell);
  
              ......
             Chunk linebreak = new Chunk(new DottedLineSeparator());
                  doc.Add(linebreak);   
  
                  doc.Add(new Paragraph(""));
             ....
  }
  </code></pre>