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document.Save(filename);                    

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XImage image = XImage.FromFile("Unknown.jpg");
gfx.DrawImage(image, new Point(30, 30));                    

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string path = Path.Combine(Application.StartupPath, "Unknown.jpg");
XImage image = XImage.FromFile(path);                    

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string path = Path.Combine(Application.StartupPath, "Unknown.jpg");
XImage image = XImage.FromFile(path);
gfx.DrawImage(image,100,20,300,200);                    

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  PdfDocument document = new PdfDocument();

        XPdfFontOptions options = new XPdfFontOptions(PdfFontEncoding.Unicode, PdfFontEmbedding.Always);

        XFont font = new XFont("Times New Roman", 12, XFontStyle.Regular, options);

        PdfPage page = document.AddPage();
        XGraphics gfx = XGraphics.FromPdfPage(page);
        XTextFormatter tf = new XTextFormatter(gfx);
        tf.Alignment = XParagraphAlignment.Left;

        tf.DrawString(textBox1.Text.Replace('\r',' '), font, XBrushes.Black,
        new XRect(100, 100, page.Width - 200, 600), XStringFormats.TopLeft);
        
        const string filename = "Unicode_tempfile.pdf";
        document.Save(filename);
        Process.Start(filename);                    

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gfx.DrawString(XXXXX?????, font, XBrushes.Black,
               new XRect(30,700, page.Width, page.Height),
               XStringFormats.TopLeft);                    

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//Hier sind keine Zeilenumbrüche möglich
gfx.DrawString(textBox.Text, font, XBrushes.Black,
new XRect(30,660, page.Width, page.Height),
XStringFormats.TopLeft);

//Mit diesen Zeilen aber schon
XPdfFontOptions options = new XPdfFontOptions(PdfFontEncoding.Unicode, PdfFontEmbedding.Always);

tf.DrawString(textBox.Text.Replace(' ', ' '), font, XBrushes.Black,
new XRect(30, 220, page.Width - 10, 700), XStringFormats.TopLeft);                    

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PdfDocument document = new PdfDocument();
......
const string filename = "Test";            
document.Save(filename);
System.Diagnostics.Process.Start(filename)