private void createPdfButton_Click(object sender, EventArgs e)
{
    // Create a PDF document
    Document pdfDocument = new Document();

    // Set license key received after purchase to use the converter in licensed mode
    // Leave it not set to use the converter in demo mode
    pdfDocument.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=";

    Cursor = Cursors.WaitCursor;
    string outPdfFile = @"DemoAppFiles\Output\PDF_Creator\Text_Elements.pdf";
    try
    {
        // The result of adding Text Elements to PDF document
        AddElementResult addTextResult = null;

        // The titles font used to mark various sections of the PDF document
        PdfFont titleFont = pdfDocument.AddFont(new Font("Times New Roman", 10, FontStyle.Bold, GraphicsUnit.Point));
        titleFont.IsUnderline = true;

        // The position on X anf Y axes where to add the next element
        float yLocation = 5;
        float xLocation = 5;

        // Create a PDF page in PDF document
        PdfPage pdfPage = pdfDocument.AddPage();

        // Text Elements Using Fonts Installed in System

        // Add section title
        TextElement titleTextElement = new TextElement(xLocation, yLocation, "Text Elements Using Fonts Installed in System", titleFont);
        titleTextElement.ForeColor = Color.DarkGreen;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Embed in PDF document a font with Normal style installed in system
        Font systemFontNormal = new Font("Times New Roman", 10, GraphicsUnit.Point);
        PdfFont embeddedSystemFontNormal = pdfDocument.AddFont(systemFontNormal);

        // Add a text element using a font with Normal style installed in system
        TextElement embeddedSystemFontNormalTextElement = new TextElement(xLocation, yLocation, "This text uses a font with Normal style installed in system", embeddedSystemFontNormal);
        addTextResult = pdfPage.AddElement(embeddedSystemFontNormalTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Embed in PDF document a font with Bold style installed in system
        Font systemFontBold = new Font("Times New Roman", 10, FontStyle.Bold, GraphicsUnit.Point);
        PdfFont embeddedSystemFontBold = pdfDocument.AddFont(systemFontBold);

        // Add a text element using a font with Bold style installed in system
        TextElement embeddedSystemFontBoldTextElement = new TextElement(xLocation, yLocation, "This text uses a font with Bold style installed in system", embeddedSystemFontBold);
        addTextResult = pdfPage.AddElement(embeddedSystemFontBoldTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Embed in PDF document a font with Italic style installed in system
        Font systemFontItalic = new Font("Times New Roman", 10, FontStyle.Italic, GraphicsUnit.Point);
        PdfFont embeddedSystemFontItalic = pdfDocument.AddFont(systemFontItalic);

        // Add a text element using a font with Italic style installed in system
        TextElement embeddedSystemFontItalicTextElement = new TextElement(xLocation, yLocation, "This text uses a font with Italic style installed in system", embeddedSystemFontItalic);
        addTextResult = pdfPage.AddElement(embeddedSystemFontItalicTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Text Elements Using Fonts From Local Files

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Text Elements Using Fonts From Local Files", titleFont);
        titleTextElement.ForeColor = Color.Navy;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Embed a True Type font from a local file in PDF document
        PdfFont localTrueTypeFont = pdfDocument.AddFont(@"DemoAppFiles\Input\Fonts\TrueType.ttf");

        // Add a text element using the local True Type font to PDF document
        TextElement localFontTtfTextElement = new TextElement(xLocation, yLocation, "This text uses a True Type Font loaded from a local file", localTrueTypeFont);
        addTextResult = pdfPage.AddElement(localFontTtfTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom;
        pdfPage = addTextResult.EndPdfPage;

        // Embed an OpenType font with TrueType Outlines in PDF document
        PdfFont localOpenTypeTrueTypeFont = pdfDocument.AddFont(@"DemoAppFiles\Input\Fonts\OpenTypeTrueType.otf");

        // Add a text element using the local OpenType font with TrueType Outlines to PDF document
        TextElement localOpenTypeTrueTypeFontTextElement = new TextElement(xLocation, yLocation, "This text uses an Open Type Font with TrueType Outlines loaded from a local file", localOpenTypeTrueTypeFont);
        addTextResult = pdfPage.AddElement(localOpenTypeTrueTypeFontTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        //  Embed an OpenType font with PostScript Outlines in PDF document
        PdfFont localOpenTypePostScriptFont = pdfDocument.AddFont(@"DemoAppFiles\Input\Fonts\OpenTypePostScript.otf");

        // Add a text element using the local OpenType font with PostScript Outlines to PDF document
        TextElement localOpenTypePostScriptFontTextElement = new TextElement(xLocation, yLocation, "This text uses an Open Type Font with PostScript Outlines loaded from a local file", localOpenTypePostScriptFont);
        addTextResult = pdfPage.AddElement(localOpenTypePostScriptFontTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Text Elements Using Standard PDF Fonts

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Text Elements Using Standard PDF Fonts", titleFont);
        titleTextElement.ForeColor = Color.DarkGreen;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Create a standard PDF font with Normal style
        PdfFont standardPdfFontNormal = pdfDocument.AddFont(StdFontBaseFamily.Helvetica);
        standardPdfFontNormal.Size = 10;

        // Add a text element using the standard PDF font with Normal style
        TextElement standardPdfFontNormalTextElement = new TextElement(xLocation, yLocation, "This text uses a standard PDF font with Normal style", standardPdfFontNormal);
        addTextResult = pdfPage.AddElement(standardPdfFontNormalTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Create a standard PDF font with Bold style
        PdfFont standardPdfFontBold = pdfDocument.AddFont(StdFontBaseFamily.HelveticaBold);
        standardPdfFontBold.Size = 10;

        // Add a text element using the standard PDF font with Bold style
        TextElement standardPdfFontBoldTextElement = new TextElement(xLocation, yLocation, "This text uses a standard PDF font with Bold style", standardPdfFontBold);
        addTextResult = pdfPage.AddElement(standardPdfFontBoldTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Create a standard PDF font with Italic style
        PdfFont standardPdfFontItalic = pdfDocument.AddFont(StdFontBaseFamily.HelveticaOblique);
        standardPdfFontItalic.Size = 10;

        // Add a text element using the standard PDF font with Italic style
        TextElement standardPdfFontItalicTextElement = new TextElement(xLocation, yLocation, "This text uses a standard PDF font with Italic style", standardPdfFontItalic);
        addTextResult = pdfPage.AddElement(standardPdfFontItalicTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Text Elements with Vertical Text

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Vertical Text", titleFont);
        titleTextElement.ForeColor = Color.Navy;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Add a top to bottom vertical text
        string topBottomText = "This is a Top to Bottom Vertical Text";
        float topBottomTextWidth = embeddedSystemFontNormal.GetTextWidth(topBottomText);

        TextElement topBottomVerticalTextElement = new TextElement(0, 0, topBottomText, embeddedSystemFontNormal);
        topBottomVerticalTextElement.Translate(xLocation + 25, yLocation);
        topBottomVerticalTextElement.Rotate(90);
        pdfPage.AddElement(topBottomVerticalTextElement);

        // Add a bottom to top vertical text
        string bottomTopText = "This is a Bottom to Top Vertical Text";
        float bottomTopTextWidth = embeddedSystemFontNormal.GetTextWidth(bottomTopText);

        TextElement bottomTopVerticalTextElement = new TextElement(0, 0, bottomTopText, embeddedSystemFontNormal);
        bottomTopVerticalTextElement.Translate(xLocation + 125, yLocation + bottomTopTextWidth);
        bottomTopVerticalTextElement.Rotate(-90);
        pdfPage.AddElement(bottomTopVerticalTextElement);

        yLocation += bottomTopTextWidth + 10;

        // Add a text element that flows freely in width and height

        string text = System.IO.File.ReadAllText(@"DemoAppFiles\Input\Text_Files\Text_File.txt");

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Text Element that flows freely in width and height", titleFont);
        titleTextElement.ForeColor = Color.DarkGreen;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Add the text element
        TextElement freeWidthAndHeightTextElement = new TextElement(xLocation, yLocation, text, embeddedSystemFontNormal);
        addTextResult = pdfPage.AddElement(freeWidthAndHeightTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Add a text element with a given width that flows freely in height

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Text Element with a given width that flows freely in height", titleFont);
        titleTextElement.ForeColor = Color.Navy;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Add the text element
        TextElement freeHeightTextElement = new TextElement(xLocation, yLocation, 400, text, embeddedSystemFontNormal);
        addTextResult = pdfPage.AddElement(freeHeightTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Add a bounding rectangle for text element
        RectangleElement border = new RectangleElement(addTextResult.EndPageBounds.X, addTextResult.EndPageBounds.Y,
                    addTextResult.EndPageBounds.Width, addTextResult.EndPageBounds.Height);
        pdfPage.AddElement(border);

        // Add a text element with a given width and height

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Text Element with a given width and height", titleFont);
        titleTextElement.ForeColor = Color.DarkGreen;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Add the text element
        TextElement boundedTextElement = new TextElement(xLocation, yLocation, 400, 50, text, embeddedSystemFontNormal);
        addTextResult = pdfPage.AddElement(boundedTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Add a bounding rectangle for text element
        border = new RectangleElement(addTextResult.EndPageBounds.X, addTextResult.EndPageBounds.Y,
                    addTextResult.EndPageBounds.Width, addTextResult.EndPageBounds.Height);
        pdfPage.AddElement(border);

        // Add a text element that flows freely on next PDF page

        // Add section title
        xLocation -= 5;
        yLocation += 10;
        titleTextElement = new TextElement(xLocation, yLocation, "Text Element that flows freely on multiple PDF pages", titleFont);
        titleTextElement.ForeColor = Color.Navy;
        addTextResult = pdfPage.AddElement(titleTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 10;
        xLocation += 5;
        pdfPage = addTextResult.EndPdfPage;

        // Add the text element
        string multiPageText = System.IO.File.ReadAllText(@"DemoAppFiles\Input\Text_Files\Large_Text_File.txt");
        TextElement multiPageTextElement = new TextElement(xLocation, yLocation, 575, multiPageText, embeddedSystemFontNormal);
        multiPageTextElement.BackColor = Color.WhiteSmoke;
        addTextResult = pdfPage.AddElement(multiPageTextElement);
        yLocation = addTextResult.EndPageBounds.Bottom + 3;
        pdfPage = addTextResult.EndPdfPage;

        // Add a line at the bottom of the multipage text element

        LineElement bottomLine = new LineElement(addTextResult.EndPageBounds.X, addTextResult.EndPageBounds.Bottom + 1,
            addTextResult.EndPageBounds.X + addTextResult.EndPageBounds.Width, addTextResult.EndPageBounds.Bottom + 1);
        pdfPage.AddElement(bottomLine);

        // Add a text stamp to a PDF document

        // Create a .NET font
        Font timesNewRomanFont = new Font("Times New Roman", 24, GraphicsUnit.Point);
        // Create a PDF font
        PdfFont stampPdfFont = pdfDocument.AddFont(timesNewRomanFont, true);
        // The stamp text
        string stampText = String.Format("Text Stamp {0}", DateTime.Now.ToString("d"));
        // Measure the text 
        float textWidth = stampPdfFont.GetTextWidth(stampText);
        foreach (PdfPage page in pdfDocument.Pages)
        {
            // Get the PDF page drawable area width and height
            float pdfPageWidth = page.ClientRectangle.Width;
            float pdfPageHeight = page.ClientRectangle.Height;

            // Calculate the PDF page diagonal
            float pdfPageDiagonal = (float)Math.Sqrt(pdfPageWidth * pdfPageWidth + pdfPageHeight * pdfPageHeight);

            // The text location on PDF page diagonal
            float xStampLocation = (pdfPageDiagonal - textWidth) / 2;

            // Create the stamp as a rotated text element
            TextElement stampTextElement = new TextElement(xStampLocation, 0, stampText, stampPdfFont);
            stampTextElement.ForeColor = Color.Coral;
            stampTextElement.Rotate((float)(Math.Atan(pdfPageHeight / pdfPageWidth) * (180 / Math.PI)));
            stampTextElement.Opacity = 75;

            // Add the stamp to PDF page
            page.AddElement(stampTextElement);
        }

        // Save the PDF document in a memory buffer
        byte[] outPdfBuffer = pdfDocument.Save();

        // Write the memory buffer in a PDF file
        System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer);
    }
    catch (Exception ex)
    {
        // The PDF creation failed
        MessageBox.Show(String.Format("Create PDF Document Error. {0}", ex.Message));
        return;
    }
    finally
    {
        // Close the PDF document
        pdfDocument.Close();

        Cursor = Cursors.Arrow;
    }
            
    // Open the created PDF document in default PDF viewer
    try
    {
        System.Diagnostics.Process.Start(outPdfFile);
    }
    catch (Exception ex)
    {
        MessageBox.Show(String.Format("Cannot open created PDF file '{0}'. {1}", outPdfFile, ex.Message));
    }
}