    protected 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 = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

        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(Server.MapPath("~/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(Server.MapPath("~/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(Server.MapPath("~/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(Server.MapPath("~/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(Server.MapPath("~/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();

            // Send the PDF as response to browser

            // Set response content type
            Response.AddHeader("Content-Type", "application/pdf");

            // Instruct the browser to open the PDF file as an attachment or inline
            Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Text_Elements.pdf; size={0}", outPdfBuffer.Length.ToString()));

            // Write the PDF document buffer to HTTP response
            Response.BinaryWrite(outPdfBuffer);

            // End the HTTP response and stop the current page processing
            Response.End();
        }
        finally
        {
            // Close the PDF document
            pdfDocument.Close();
        }
    }