C# iText split PDF C# 拆分PDF

using System.Linq;
using System.Text;
using System.Threading.Tasks; 
using System.Configuration; 
using iText.Kernel.Utils;
using iText.Kernel.Pdf;
using System.IO;
using System.Web.UI;
using System.Windows.Forms; 

class Program
    {      
        static void Main(string[] args)
        {
            UltimateITextSplitPDF();
            Console.ReadLine();
        }

        static void UltimateITextSplitPDF()
        {
            string rawPdfFile = @"D:\C\C\ConsoleApp1\EJATT.pdf";
            Program objProvider = new Program();
            objProvider.PDFSplitExample(rawPdfFile);
        }      

        void PDFSplitExample(string rawPdfFile)
        {
            if(!File.Exists(rawPdfFile))
            {
                return;
            }
            MCSPdfSplitter mcsPdfSplitterProvider;
            //Generated physical split pdf files by GetNextPdfWriter of MCSPdfSplitter
            using (var pdfDoc = new PdfDocument(new PdfReader(rawPdfFile)))
            {
                mcsPdfSplitterProvider = new MCSPdfSplitter(pdfDoc, rawPdfFile);                 
                var splitPdfDocs = mcsPdfSplitterProvider.SplitByPageCount(1);
                foreach (var splitPDF in splitPdfDocs)
                {
                    splitPDF.Close();
                }               
            }

            mcsPdfSplitterProvider.SplitPdfNamesList.ForEach(x =>
            {
                if (File.Exists(x))
                {
                    byte[] pdfByte = File.ReadAllBytes(x);
                    Console.WriteLine($"Before delete,Name {x},length {pdfByte.Length}");
                    File.Delete(x);
                }
            });
        }
}