Split PDF Files in C#

split-pdf-multiple-pages.cs

// Open document
Document pdfDocument = new Document("merged.pdf"); 

// Select even pages only
Aspose.Pdf.Page[] evenPages = pdfDocument.Pages.Where(x => x.Number % 2 == 0).ToArray();

// Select odd pages only
Aspose.Pdf.Page[] oddPages = pdfDocument.Pages.Where(x => x.Number % 2 != 0).ToArray();

// Save even pages as PDF
Document newDocument = new Document();
newDocument.Pages.Add(evenPages);
newDocument.Save("split_even_Pages.pdf");

// Save odd pages as PDF
newDocument = new Document();
newDocument.Pages.Add(oddPages);
newDocument.Save("split_odd_Pages.pdf");

split-pdf.cs

// Open document
Document pdfDocument = new Document("merged.pdf");

// For page counter
int pageCount = 1;

// Loop through all the pages
foreach (Aspose.Pdf.Page pdfPage in pdfDocument.Pages)
{
  	// Create a new document
	Document newDocument = new Document();
  
  	// Add page to the document
	newDocument.Pages.Add(pdfPage);
  
  	// Save as PDF 
	newDocument.Save("page_" + pageCount + "_out" + ".pdf");
	pageCount++;
}