C# - open source knihovna pro čtení PDF a RTF

            openFileDialog1.Filter = "PDF files (*.pdf)|*.pdf";

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string filename = openFileDialog1.FileName;
                // Read document into memory for modification
                PdfDocument document = PdfReader.Open(filename);
                textBox2.Text += "\r\nLanguage\t:\t\t" + document.Language;     //funkcni ?
                textBox2.Text += "\r\nPage count\t:\t\t" + document.PageCount;
                textBox2.Text += "\r\nPage layout\t:\t\t" + document.PageLayout;
                textBox2.Text += "\r\nTag\t\t:\t\t" + document.Tag;             //asi nefunkcni :(
                textBox2.Text += "\r\nVersion of PDF\t:\t\t" + document.Version/10.0;
                textBox2.Text += "\r\nAuthor\t\t:\t\t" + document.Info.Author;  //asi nefunkcni :(
                textBox2.Text += "\r\nBy program\t:\t\t" + document.Info.Producer + " / " + document.Info.Creator;
                textBox2.Text += "\r\nKeywords\t\t:\t\t" + document.Info.Keywords;//asi nefunkcni :(
                textBox2.Text += "\r\nSubject\t\t:\t\t" + document.Info.Subject;  //asi nefunkcni :(
                textBox2.Text += "\r\nTitle\t\t:\t\t" + document.Info.Title;      //asi nefunkcni :(
            }

                // Document metadata.
                #region metadata
                File file = new File();
                Document document = file.Document;
 Information info = new Information(document);
                document.Information = info;
                textBox2.Text += "\r\nAuthor\t\t:\t\t" + info.Author;
                textBox2.Text += "\r\nCreation Date\t\t:\t\t" + info.CreationDate;
                textBox2.Text += "\r\nCreator\t\t:\t\t" + info.Creator;
                textBox2.Text += "\r\nTitle\t\t:\t\t" + info.Title;
                textBox2.Text += "\r\nSubject\t\t:\t\t" + info.Subject;
                #endregion metadata

                Document document = fileName;

File file = new File(@"C:\esta\k\nejakemu.pdf");
Document document = file.Document;
Information information = document.Information;
Console.WriteLine("Author: " + information.Author);
Console.WriteLine("Creation Date: " + information.CreationDate);
Console.WriteLine("Creator: " + information.Creator);
Console.WriteLine("Title: " + information.Title);
Console.WriteLine("Subject: " + information.Subject);

using it.stefanochizzolini.clown.files;
using it.stefanochizzolini.clown.documents;
using it.stefanochizzolini.clown.documents.interchange.metadata;

           openFileDialog1.Filter = "PDF files (*.pdf)|*.pdf";

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string fileName = openFileDialog1.FileName;
                System.IO.FileInfo fi = new System.IO.FileInfo(fileName);


                // Document metadata.
                #region metadata
                File file = new File(fileName);
                Document document = file.Document;
                //...

openFileDialog1.Filter = "PDF files (*.pdf)|*.pdf";

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string filename = openFileDialog1.FileName;

                Document document = new Document();
                PdfReader read = new PdfReader(filename);
                document.Open();
                textBox1.Text += "Pages:" + read.NumberOfPages;
                textBox1.Text += "\r\nVersion:" + read.PdfVersion;
                textBox1.Text += "\r\nLength:" + read.FileLength + " bytes";
                textBox1.Text += "\r\nEncrypted?:" + read.IsEncrypted();//jestli true nedostanu se ani k pages...
                textBox1.Text += "\r\nPermissions:" + read.Metadata.???

 st.MoreInfo = this.metadata.getMetaData();

PdfReader reader = new PdfReader(filename);

foreach (DictionaryEntry entry in reader.Info)
	Console.WriteLine(string.Format("{0}: {1}", entry.Key, entry.Value));

                PdfDocument document = PdfReader.Open(filename);
                document.Tag = "AAAAAAAAA";
                document.Save(filename);
textBox2.Text += "\r\nTag\t\t:\t\t" + document.Tag;             //asi nefunkcni :(

document.Tag = "AAAAAAAAA";

using (PdfDocument document = PdfReader.Open(filename))
	foreach (DictionaryEntry entry in document.Info)
		Console.WriteLine(string.Format("{0}: {1}", entry.Key, entry.Value));