CSharp: UglyToad.PdfPig int .net8

/*
 IDE: VS 2022 17.5
 OS: windows 10
 .net: 8.0
  生成PDF文档，从PDF文档中获取文字内容  控制台下测试
 */

// See https://aka.ms/new-console-template for more information

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using UglyToad.PdfPig;
using UglyToad.PdfPig.AcroForms;
using UglyToad.PdfPig.AcroForms.Fields;
using UglyToad.PdfPig.Content;
using UglyToad.PdfPig.Outline;
using System.IO;
using UglyToad.PdfPig.Core;
using UglyToad.PdfPig.Fonts.Standard14Fonts;
using UglyToad.PdfPig.Fonts.SystemFonts;
using UglyToad.PdfPig.Writer;
using System.Drawing;
using System.Drawing.Text;



        Console.WriteLine("Hello,CSharp World! Geovin Du,geovindu, 涂聚文\n\t");

        try { 

            PdfDocumentBuilder builder = new PdfDocumentBuilder();

            //string fontfile = Server.MapPath("fonts/MHeiHK-Light.TTF");
            //byte[] robotoBytes = File.ReadAllBytes(fontfile);
            // PdfDocumentBuilder.AddedFont MHeiHK = builder.AddTrueTypeFont(robotoBytes);

            // 读取宋体字体文件到字节数组 中文必须是中文字体，相应文字语言，用相关的字体   simsunb.ttf
            byte[] simSunFontBytes;
            using (FileStream fontFileStream = File.OpenRead("C:\\Windows\\Fonts\\STSONG.TTF"))
            {
                simSunFontBytes = new byte[fontFileStream.Length];
                fontFileStream.Read(simSunFontBytes, 0, simSunFontBytes.Length);
            }





            // 添加支持中文的字体  
            PdfDocumentBuilder.AddedFont font = builder.AddTrueTypeFont(simSunFontBytes);





            PdfDocumentBuilder.AddedFont helvetica = builder.AddStandard14Font(Standard14Font.Helvetica);
            PdfDocumentBuilder.AddedFont helveticaBold = builder.AddStandard14Font(Standard14Font.HelveticaBold);

            //  PdfDocumentBuilder.AddedFont song = builder.AddStandard14Font(Standard14Font.simsunb);


            PdfPageBuilder page = builder.AddPage(PageSize.A4);

            PdfPoint closeToTop = new PdfPoint(15, page.PageSize.Top - 25);

            page.AddText("My first PDF document!", 12, closeToTop, helvetica);

            page.AddText("Hello CSharp World!,Geovin Du!", 10, closeToTop.Translate(0, -15), helveticaBold);

            page = builder.AddPage(PageSize.A4);

            page.AddText("geovindu!", 12, closeToTop, helvetica); //中文用中文系统字体

            page = builder.AddPage(PageSize.A4);


            //写入
            page.AddText("你好，这是一个PDF文档。涂聚文欢迎你！", 12, new PdfPoint(25, 520), font);

            //byte[] b = builder.Build();

            string fiel = "file.pdf";
            File.WriteAllBytes(fiel, builder.Build());
            Console.WriteLine("文档生成ok\n\t");
            //从PDF文件中读取文字内容
            string fileout ="1.pdf";
            using (PdfDocument document = PdfDocument.Open(fileout))
            {
                foreach (UglyToad.PdfPig.Content.Page pagedu in document.GetPages())
                {
                    IEnumerable<Word> words = pagedu.GetWords();
                    foreach (Word word in words)
                    {
                        Console.WriteLine(word.Text);
                    }
                }
            }
            Console.WriteLine("\n\t从PDF文件中读取文字内容ok");



         }
         catch(Exception ex)
         {
             Console.WriteLine(ex.Message.ToString());
         }