ItextSharp -将pdf纸张大小设置为8.5x13

using System;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

class Program
{
    static void Main(string[] args)
    {
        // 创建PDF文档对象
        Document document = new Document(PageSize.LEGAL.Rotate());

        // 设置输出路径
        string outputPath = "output.pdf";

        // 创建PDF写入器
        PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(outputPath, FileMode.Create));

        // 打开文档
        document.Open();

        // 添加内容
        Paragraph paragraph = new Paragraph("Hello, World!");
        document.Add(paragraph);

        // 关闭文档
        document.Close();

        Console.WriteLine("PDF文件已生成。");
    }
}