How to split and merge PDF in C# and VB.Net?
Key Features
Text to PDF
>>Split and merge PDF
Download trial
Code examples
Video Tutorials
Version History

How to split and merge PDF in C# and VB.Net?

How to split and merge PDF in C# and VB.Net?


     Now let's get to know another benefit of the library. PDF Metamorphosis .Net offers great abilities to split and merge PDF documents. To show how PDF Metamorphosis .Net really lessens the burden of coding, assume that you want to merge 3 (three) PDF files into the one in C#:
            SautinSoft.PdfMetamorphosis p = new SautinSoft.PdfMetamorphosis();
            string[] pdfFiles = {@"c:\1.pdf", @"c:\2.pdf", @"c:\3.pdf"};
            p.MergePDFFileArrayToPDFFile(pdfFiles, @"c:\Single.pdf");            

Let's see another C# example how split PDF file by pages:
            SautinSoft.PdfMetamorphosis p = new SautinSoft.PdfMetamorphosis();

            string pdfBook = @"d:\Moscow to the End of the Line.pdf";
            string pagesFolder = @"d:\My Book pages\";
            p.SplitPDFFileToPDFFolder(pdfBook, pagesFolder);    

Nuget  Online Demo   Download, (Feb 25-th, 2020)

Have a Question?

You have a question, need a support or a code example: ask our support team at We will help you quickly and with pleasure.

PDF documents

PDF Metamorphosis .Net processes PDF documents using own PDF class. If you are looking for .NET class (C#) to convert PDF to other formats, see our PDF Focus .Net.

What PDF Metamorphosis .Net can give me:

  1. Save a time and cost of developing of my application. You will need to only add the reference to "PdfMetamorphosis.dll" and write 3-4 C# lines to get ability create PDF from HTML, RTF, Text or PDF from DOCX.

  2. The one product provides me by set of API to convert from Text, RTF, HTML to PDF at once, split and merge PDF documents.

  3. Because of this is absolutely standalone PDF library, I don't need to worry about the availability of Adobe Acrobat, MS Word, OpenOffice or other software on the my client's computers.

  4. My software will have the one of the fastest API to convert into PDF documents and therefore my clients will not have any delays during creating PDF documents.

  5. I don't need to worry about accuracy of source HTML and RTF documents. PDF Metamorphosis .Net can "eat" any types, versions and produce for me a valid PDF document.

  6. The one time price. I pay a one time and can use «PDF Metamorphosis .Net» for a whole life without any additional fees. My license will never expires.

  7. As bonus, I get unlimited technical support during a whole life for free and independently of the date of my purchasing.

Some examples to merge PDF documents in C# and VB.Net

1. Merge PDF documents in memory using C#:

            SautinSoft.PdfMetamorphosis p = new SautinSoft.PdfMetamorphosis();

            string fodlerWithPdfs = @"d:\My PDFs\";
            string singlePdf = @"d:\Single.pdf";

            string[] pdfFiles = Directory.GetFiles(fodlerWithPdfs, "*.pdf");

            // ArrayList with PDF documents, each element represents the byte array.
            ArrayList pdfDataList = new ArrayList();

            foreach (string pdfFile in pdfFiles)
            byte [] singlePdfBytes = p.MergePDFStreamArrayToPDFStream(pdfDataList);

            if (singlePdfBytes != null)
                File.WriteAllBytes(singlePdf, singlePdfBytes);
2. Split PDF documents in VB.Net:
        Dim p As New SautinSoft.PdfMetamorphosis()

        Dim pdfBook As String = "d:\The Winter Queen.pdf"
        Dim pagesFolder As String = "d:\My Book pages\"

        p.SplitPDFFileToPDFFolder(pdfBook, pagesFolder)
If anyone needs a code sample in C#, VB.Net, ASP.Net etc "How to split and merge PDF", email us at or ask at Online Chat (right-bottom corner of this page). We'll help you certainly!

Requirements and Technical Information

     Requires only .NET Framework 4.0 or higher. Our product is compatible with all .NET languages and supports all Operating Systems where .NET Framework and .NET Core can be used. Note that PDF Metamorphosis .Net is entirely written in managed C#, which makes it absolutely standalone and an independent library.

.Net Framework 4.0 and higher and .Net Core 2.0 and higher

.NET Framework 4.0, 4.5, 4.6.1 and higher.

.NET Standard 2.0

.NET Core 2.0 and higher.

Multi-platform component, runs on:

Our component has proven itself on cloud platforms and services:

  • Microsoft Azure
  • Amazon Web Services (AWS)
  • Google Cloud Platform
  • SharePoint
  • Docker
  • etc.

Reasonable prices

     The library offers developers high quality conversion at reasonable prices. The main point of interest is that PDF Metamorphosis .Net is less expensive than all of its more or less popular counterparts. For example, a single license cost $439(US) with no additional fees or royalties!


To see this functionality firsthand, download the freshest «PDF Metamorphosis .Net» with code examples, 32.7 Mb.


  • Sweden, Stockholm
  • Mortviksvagen 68B 142 43 SKOGAS
  • Tel: +46 812111486
  • Email:
    Copyright © 2002 - 2020 SautinSoft (started from All rights reserved.