title: iTextSharp Exception: Cannot Access a Closed Stream
body: <p>I'm using the iTextSharp library and have a problem.
  When I read html code I generated this exception:
  "EXCEPCION: No se puede obtener acceso a una secuencia cerrada"
  EXCEPTION: Can not access a closed sequence</p>
  
  <p>This is the code I use:</p>
  
  <pre><code>Byte[] bytes;
  
  //Boilerplate iTextSharp setup here
  //Create a stream that we can write to, in this case a MemoryStream
  using (var ms = new MemoryStream())
  {
  
      //Create an iTextSharp Document which is an abstraction of a PDF but **NOT** a PDF
      using (var doc = new Document())
      {
  
          //Create a writer that's bound to our PDF abstraction and our stream
          using (var writer = PdfWriter.GetInstance(doc, ms))
          {
  
              //Open the document for writing
              doc.Open();
              var img = iTextSharp.text.Image.GetInstance("http://" + Request.ServerVariables["SERVER_NAME"] + "/styles/imgs/noticias_ambitos/170.png");
             // var img = iTextSharp.text.Image.GetInstance("http://" + Request.ServerVariables["SERVER_NAME"] + "/styles/imgs/Fondo-Plantilla-apaisado-cabecera-pdf.jpg");
              img.ScaleAbsolute(300f, 70f);
              //Hacemos que se pueda escribir encima de la imagen.
              img.Alignment = iTextSharp.text.Image.UNDERLYING;
  
              doc.Add(img);
  
              //Create a new HTMLWorker bound to our document
              using (var htmlWorker = new iTextSharp.text.html.simpleparser.HTMLWorker(doc))
              {
  
                  //HTMLWorker doesn't read a string directly but instead needs a TextReader (which StringReader subclasses)
                  using (var sr = new StringReader(Noticia))
                  {
  
                      //Parse the HTML
                      htmlWorker.Parse(sr);
  
                  }
              }
  
  
              doc.Close();
          }
      }
  
      //After all of the PDF "stuff" above is done and closed but **before** we
      //close the MemoryStream, grab all of the active bytes from the stream
      bytes = ms.ToArray();
  }
  
  //Now we just need to do something with those bytes.
  //Here I'm writing them to disk but if you were in ASP.Net you might Response.BinaryWrite() them.
  //You could also write the bytes to a database in a varbinary() column (but please don't) or you
  //could pass them to another function for further PDF processing.
  var testFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test.pdf");
  System.IO.File.WriteAllBytes(testFile, bytes);
  </code></pre>
  
  <p>The variable "Noticia" contains tag in HTML and also tag image. The problem is caused me to enter an image HTML tag.</p>
  
  <p>How could introduce a variable that contains all kinds of tags in html to convert it to PDF?</p>
  
  <p>Thank you !!</p>