How to re-order the pages in a PDF file WinForms?

Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can reorder the pages in a PDF file.

Steps to reorder the pages in a PDF file programmatically:

1. Create a new C# console application project.
2. Install the Syncfusion.Pdf.WinForms NuGet package as a reference to the .NET framework application from NuGet.org.
3. Include the following namespaces in the program.cs file.

C#

using Syncfusion.Pdf;
using Syncfusion.Pdf.Parsing;

VB.NET

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Parsing

4. Use the following C# and VB.NET code snippet to re-order or re-arrange the pages in a PDF file.

C#

//Create an instance of PdfDocument
using (PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Data/Input.pdf"))
{
    //Rearrange the page by index
    loadedDocument.Pages.ReArrange(new int[]{1,0});
    //Save and close the document
    loadedDocument.Save("Output.pdf");
}

VB.NET

'Create an instance of PdfDocument
Using loadedDocument As PdfLoadedDocument = New PdfLoadedDocument("Data/Input.pdf")
   'Rearrange the page by index
   loadedDocument.Pages.ReArrange(New Integer() {1, 0})
   'Save and close the document
   loadedDocument.Save("Output.pdf")
End Using

A complete working sample can be downloaded from Re-order-Pages-in-PDF-File.zip.

Execute the program with the following input PDF file.

The resultant PDF document will be as follows.

Take a moment to peruse the documentation, where you can find other options like drawing right-to-left text and multi-column text,  consuming TrueType fonts, Standard fonts, CJK fonts Also, the features like PDF form filling, extract text or images from PDF, and protect PDF documents with code examples.

Refer here to explore the rich set of Syncfusion Essential PDF features.

An online sample link to reorder the pages in a PDF file.