Combine two (or more) PDF's

Question

Background: I need to provide a weekly report package for my sales staff. This package contains several (5-10) crystal reports.

Problem:

Answer 1

This is something that I figured out, and wanted to share with you.

Here you can join multiple Pdfs in one (following the input list order)

    public static byte[] MergePdf(List pdfs)
    {
        List lstDocuments = new List();
        foreach (var pdf in pdfs)
        {
            lstDocuments.Add(PdfReader.Open(new MemoryStream(pdf), PdfDocumentOpenMode.Import));
        }

        using (PdfSharp.Pdf.PdfDocument outPdf = new PdfSharp.Pdf.PdfDocument())
        { 
            for(int i = 1; i<= lstDocuments.Count; i++)
            {
                foreach(PdfSharp.Pdf.PdfPage page in lstDocuments[i-1].Pages)
                {
                    outPdf.AddPage(page);
                }
            }

            MemoryStream stream = new MemoryStream();
            outPdf.Save(stream, false);
            byte[] bytes = stream.ToArray();

            return bytes;
        }           
    }