C# PDFbox读取PDF内容

using System;using System.Windows.Forms;using org.apache.pdfbox.pdmodel;using org.apache.pdfbox.util;using System.IO;namespace ReadPDF{    public partial class Form2 : Form    {        public Form2()        {            InitializeComponent();        }        public static void pdf2txt(FileInfo pdffile)        {            PDDocument doc = PDDocument.load(pdffile.FullName);            PDFTextStripper pdfStripper = new PDFTextStripper();            string text = pdfStripper.getText(doc);        }        private void button1_Click(object sender, EventArgs e)        {            pdf2txt(new FileInfo(@"e:/5.pdf"));        }    }}