This is a Windows Form app which is used to combine multiple PDF files in a single PDF file where you locate it with the app.

I use both iTextSharp and PdfSharp NuGet packages. You can prefer both options to combine your PDF files. I tested this app a lot, but if you test and send me issues I will be so appreciated to you. This app is written in C# programming language and in Visual Studio 2022.

In this app you can do;

• Add PDF files with Drag and Drop to the blank area i.e. list box (you can add multiple files)
• Add PDF files with File Dialog (you can add multiple files)
• Add PDF files within a selected Folder with Folder Dialog
  • You will add the PDF files recursively, it adds the files in subfolders.
• In file list (With right click, you can see menu items for)
  • Deleting selected files
  • Selecting all files
  • Ordering files by path
    • Ascending or descending
  • Ordering files by file name
    • Ascending or descending
• You can order the books in listbox with drag drop
• Delete the files which you don't want to combine in your file list
• Combine files via PdfSharp
• Combine files via iTextSharp
• Multi Language support for English, Hindi, Turkish, German, French, Spanish, Russian, Italian, Chinese (Basic), Arabic, Dutch, Portuguese, Bengali, Indonesian, Japanese
• Look the process status in the progress bar (Adding files or combining files)
• Info messages after every operation in app

You can look up the source code's documentation in Documentation section. In this PDF file you can analyze source code. This PDF file supports Hyperlink, so you can go to a specific function easily. I try to write detailed comments in functions.

And you can look up screenshots like

v6

Changes within version 6:

• Modified language code and resources, changed IN to HI for Hindi as per ISO 639 language code.
• Corrected culture lists, translated "Drag and Drop" message for all languages.
• Removed space in resource file at the beginning of the message and modified string formatting.

v5

Changes within version 5:

• Implemented feature to drag and drop pdf files to the list box.
• Implemented Save As dialog to save the combined files to desired location & name

v4

Changes within version 4:

• Upgraded to the .NET 4.8 framework to facilitate the addition of new features and support future development and enhancements.
• Now compatible with Visual Studio 2022.
• Introduced a new application icon.
• Implemented a docking feature to enable the adjustment of controls in full-screen mode.

v3

v2

v1