// PM> Install-Package IronPdf
using IronPdf;
using System.Collections.Generic;

// Instantiate Renderer
var Renderer = new IronPdf.ChromePdfRenderer();

// Join Multiple Existing PDFs into a single document
var PDFs = new List<PdfDocument>();
PDFs.Add(PdfDocument.FromFile("A.pdf"));
PDFs.Add(PdfDocument.FromFile("B.pdf"));
PDFs.Add(PdfDocument.FromFile("C.pdf"));
using PdfDocument PDF = PdfDocument.Merge(PDFs);
PDF.SaveAs("merged.pdf");

// Add a cover page
PDF.PrependPdf(Renderer.RenderHtmlAsPdf("<h1>Cover Page</h1><hr>"));

// Remove the last page from the PDF and save again
PDF.RemovePage(PDF.PageCount - 1);
PDF.SaveAs("merged.pdf");

// Copy pages 5-7 and save them as a new document.
PDF.CopyPages(4, 6).SaveAs("exerpt.pdf");

foreach (var pdf in PDFs)
{
	pdf.Dispose();
}

' PM> Install-Package IronPdf
Imports IronPdf
Imports System.Collections.Generic

' Instantiate Renderer
Private Renderer = New IronPdf.ChromePdfRenderer()

' Join Multiple Existing PDFs into a single document
Private PDFs = New List(Of PdfDocument)()
PDFs.Add(PdfDocument.FromFile("A.pdf"))
PDFs.Add(PdfDocument.FromFile("B.pdf"))
PDFs.Add(PdfDocument.FromFile("C.pdf"))
Using PDF As PdfDocument = PdfDocument.Merge(PDFs)
	PDF.SaveAs("merged.pdf")
	
	' Add a cover page
	PDF.PrependPdf(Renderer.RenderHtmlAsPdf("<h1>Cover Page</h1><hr>"))
	
	' Remove the last page from the PDF and save again
	PDF.RemovePage(PDF.PageCount - 1)
	PDF.SaveAs("merged.pdf")
	
	' Copy pages 5-7 and save them as a new document.
	PDF.CopyPages(4, 6).SaveAs("exerpt.pdf")
	
'INSTANT VB NOTE: The variable pdf was renamed since Visual Basic will not allow local variables with the same name as parameters or other local variables:
	For Each Me.pdf_Conflict In PDFs
		Me.pdf_Conflict.Dispose()
	Next pdf_Conflict
End Using