C# iTextSharp Merge multiple pdf via byte array
<p>I am new to using iTextSharp and working with Pdf files in general, but I think I'm on the right track.  </p>

<p>I iterate through a list of pdf files, convert them to bytes, and push all of the resulting bytes into a byte array.  From there I pass the byte array to concatAndAddContent() to merge all of the pdf's into a single large pdf.  Currently I'm just getting the last pdf in the list (they seem to be overwriting) </p>

<pre><code>public static byte[] concatAndAddContent(List&lt;byte[]&gt; pdfByteContent)
    {
        byte[] allBytes;

        using (MemoryStream ms = new MemoryStream())
        {
            Document doc = new Document();
            PdfWriter writer = PdfWriter.GetInstance(doc, ms);

            doc.SetPageSize(PageSize.LETTER);
            doc.Open();
            PdfContentByte cb = writer.DirectContent;
            PdfImportedPage page;

            PdfReader reader;
            foreach (byte[] p in pdfByteContent)
            {
                reader = new PdfReader(p);
                int pages = reader.NumberOfPages;

                // loop over document pages
                for (int i = 1; i &lt;= pages; i++)
                {
                    doc.SetPageSize(PageSize.LETTER);
                    doc.NewPage();
                    page = writer.GetImportedPage(reader, i);
                    cb.AddTemplate(page, 0, 0);

                }
            }

            doc.Close();
            allBytes = ms.GetBuffer();
            ms.Flush();
            ms.Dispose();
        }

        return allBytes;
    }
</code></pre>

<p>Above is the working code that results in a single pdf being created, and the rest of the files are being ignored.  Any suggestions </p>