title: How can I obtain the bleed box size of a PDF page?
body: <p>I'm trying to get all possible page boundaries from a PDF, but when I ask for the "bleed", I get a Null value:</p>
  
  <pre><code>private void button2_Click(object sender, EventArgs e)
      {
          string source = @"C:\\Users\\numx\\Desktop\\TestPDF.pdf";
          PdfReader reader = new PdfReader(source);
  
          iTextSharp.text.Rectangle cropBox = reader.GetCropBox(1);
          iTextSharp.text.Rectangle mediaBox = reader.GetBoxSize(1, "media");
          iTextSharp.text.Rectangle trimBox = reader.GetBoxSize(1, "trim");          
          iTextSharp.text.Rectangle artBox = reader.GetBoxSize(1, "art");
  
          iTextSharp.text.Rectangle bleedBox = reader.GetBoxSize(1, "bleed");
  
          MessageBox.Show(bleedBox.ToString());
          reader.Close();
  
      }
  </code></pre>