PDF Booklet in C#, VB.NET

using System;
using Spire.Pdf;

namespace Booklet
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a pdf document.
            PdfDocument doc = new PdfDocument();

            String srcPdf = @"Sample2.pdf";
            float width = PdfPageSize.A4.Width * 2;
            float height = PdfPageSize.A4.Height;
            doc.CreateBooklet(srcPdf, width, height, true);

            //Save pdf file.
            doc.SaveToFile("Booklet.pdf");
            doc.Close();

            //Launching the Pdf file.
            System.Diagnostics.Process.Start("Booklet.pdf");
        }
    }
}

Imports Spire.Pdf

Namespace Booklet
    Friend Class Program
        Shared Sub Main(ByVal args() As String)
            'Create a pdf document.
            Dim doc As New PdfDocument()

            Dim srcPdf As String = "Sample2.pdf"
            Dim width As Single = PdfPageSize.A4.Width * 2
            Dim height As Single = PdfPageSize.A4.Height
            doc.CreateBooklet(srcPdf, width, height, True)

            'Save pdf file.
            doc.SaveToFile("Booklet.pdf")
            doc.Close()

            'Launching the Pdf file.
            Process.Start("Booklet.pdf")
        End Sub
    End Class
End Namespace