using Spire.Doc;
using Spire.Doc.Documents;

namespace LinkToBookmark
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document object
            Document doc = new Document();

            //Add two sections
            Section section1 = doc.AddSection();
            Section section2 = doc.AddSection();

            //Insert a paragraph in section 2 and add a bookmark named "myBookmark" to it
            Paragraph bookmarkParagrapg = section2.AddParagraph();
            bookmarkParagrapg.AppendText("Here is a bookmark");
            BookmarkStart start = bookmarkParagrapg.AppendBookmarkStart("myBookmark");
            bookmarkParagrapg.Items.Insert(0, start);
            bookmarkParagrapg.AppendBookmarkEnd("myBookmark");

            //Link to the bookmark
            Paragraph paragraph = section1.AddParagraph();
            paragraph.AppendText("Link to a bookmark: ");
            paragraph.AppendHyperlink("myBookmark", "Jump to a location in this document", HyperlinkType.Bookmark);

            //Save to file
            doc.SaveToFile("LinkToBookmark.docx", FileFormat.Docx2013);
        }
    }
}

Imports Spire.Doc
Imports Spire.Doc.Documents

Namespace LinkToBookmark
    Class Program
        Shared  Sub Main(ByVal args() As String)
            'Create a Document object
            Document doc = New Document()
 
            'Add two sections
            Dim section1 As Section = doc.AddSection()
            Dim section2 As Section = doc.AddSection()
 
            'Insert a paragraph in section 2 and add a bookmark named "myBookmark" to it
            Dim bookmarkParagrapg As Paragraph = section2.AddParagraph()
            bookmarkParagrapg.AppendText("Here is a bookmark")
            Dim start As BookmarkStart = bookmarkParagrapg.AppendBookmarkStart("myBookmark")
            bookmarkParagrapg.Items.Insert(0, start)
            bookmarkParagrapg.AppendBookmarkEnd("myBookmark")
 
            'Link to the bookmark
            Dim paragraph As Paragraph = section1.AddParagraph()
            paragraph.AppendText("Link to a bookmark: ")
            paragraph.AppendHyperlink("myBookmark", "Jump to a location in this document", HyperlinkType.Bookmark)
 
            'Save to file
            doc.SaveToFile("LinkToBookmark.docx", FileFormat.Docx2013)
        End Sub
    End Class
End Namespace

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System;
using System.Drawing;
using System.Windows.Forms;

namespace WatermarkDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a PPT document and load file
            Presentation presentation = new Presentation();
            presentation.LoadFromFile("Sample.pptx");

            //Get the size of the watermark string
            Font font = new Font("Arial", 20);
            String watermarkText = "E-iceblue";
            SizeF size = TextRenderer.MeasureText("E-iceblue", font);
            float x = 30;
            float y = 80;
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    //Define a rectangle range
                    RectangleF rect = new RectangleF(x, y, size.Width, size.Height);

                    //Add a rectangle shape with a defined range
                    IAutoShape shape = presentation.Slides[0].Shapes.AppendShape(Spire.Presentation.ShapeType.Rectangle, rect);

                    //Set the style of the shape
                    shape.Fill.FillType = FillFormatType.None;
                    shape.ShapeStyle.LineColor.Color = Color.White;
                    shape.Rotation = -45;
                    shape.Locking.SelectionProtection = true;
                    shape.Line.FillType = FillFormatType.None;

                    //Add text to the shape
                    shape.TextFrame.Text = watermarkText;
                    TextRange textRange = shape.TextFrame.TextRange;
                    //Set the style of the text range
                    textRange.Fill.FillType = FillFormatType.Solid;
                    textRange.Fill.SolidColor.Color = Color.FromArgb(120, Color.HotPink);
                    textRange.EastAsianFont = new TextFont(font.Name);
                    textRange.FontHeight = font.Size;

                    x += (100 + size.Width);
                }
                x = 30;
                y += (100 + size.Height);
            }

            //Save the document
            presentation.SaveToFile("Watermark_result.pptx", FileFormat.Pptx2010);

        }
    }
}

Imports Spire.Presentation
Imports Spire.Presentation.Drawing
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Namespace WatermarkDemo
    
    Class Program
        
        Private Shared Sub Main(ByVal args() As String)
            'Create a PPT document and load file
            Dim presentation As Presentation = New Presentation
            presentation.LoadFromFile("Sample.pptx")
            'Get the size of the watermark string
            Dim font As Font = New Font("Arial", 20)
            Dim watermarkText As String = "E-iceblue"
            Dim size As SizeF = TextRenderer.MeasureText("E-iceblue", font)
            Dim x As Single = 30
            Dim y As Single = 80
            Dim i As Integer = 0
            Do While (i < 3)
                Dim j As Integer = 0
                Do While (j < 3)
                    'Define a rectangle range
                    Dim rect As RectangleF = New RectangleF(x, y, size.Width, size.Height)
                    'Add a rectangle shape with a defined range
                    Dim shape As IAutoShape = presentation.Slides(0).Shapes.AppendShape(Spire.Presentation.ShapeType.Rectangle, rect)
                    'Set the style of the shape
                    shape.Fill.FillType = FillFormatType.None
                    shape.ShapeStyle.LineColor.Color = Color.White
                    shape.Rotation = -45
                    shape.Locking.SelectionProtection = true
                    shape.Line.FillType = FillFormatType.None
                    'Add text to the shape
                    shape.TextFrame.Text = watermarkText
                    Dim textRange As TextRange = shape.TextFrame.TextRange
                    'Set the style of the text range
                    textRange.Fill.FillType = FillFormatType.Solid
                    textRange.Fill.SolidColor.Color = Color.FromArgb(120, Color.HotPink)
                    textRange.EastAsianFont = New TextFont(font.Name)
                    textRange.FontHeight = font.Size
                    x = (x + (100 + size.Width))
                    j = (j + 1)
                Loop
                
                x = 30
                y = (y + (100 + size.Height))
                i = (i + 1)
            Loop
            
            'Save the document
            presentation.SaveToFile("Watermark_result.pptx", FileFormat.Pptx2010)
        End Sub
    End Class
End Namespace

using Spire.Pdf;
using System;

namespace PdfDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            string fileName = "Sample.pdf";
            bool value = PdfDocument.IsPasswordProtected(fileName);

            Console.WriteLine(value);
            Console.ReadKey();

        }
    }
}

Imports Spire.Pdf
Imports System

Namespace PdfDemo
    
    Class Program
        
        Private Shared Sub Main(ByVal args() As String)
            Dim fileName As String = "Sample.pdf"
            Dim value As Boolean = PdfDocument.IsPasswordProtected(fileName)
            Console.WriteLine(value)
            Console.ReadKey
        End Sub
    End Class
End Namespace

using Spire.Pdf;
using Spire.Pdf.General.Find;
using Spire.Pdf.Graphics;
using System.Drawing;

namespace AddLineNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a PdfDocument of instance
            PdfDocument doc = new PdfDocument();

            //Load a PDF document
            doc.LoadFromFile(@"G:\360MoveData\Users\Administrator\Desktop\sample.pdf");

            //Get the first page
            PdfPageBase page = doc.Pages[0];

            //Find the spcific text in the fisrt line
            PdfTextFind topLine = page.FindText("C# (pronounced See Sharp)", TextFindParameter.None).Finds[0];

            //Get the line height
            float lineHeight = topLine.Bounds.Height;

            //Get the Y coordinate of the selected text
            float y = topLine.Bounds.Y;

            //Find the spcific text in the second line
            PdfTextFind secondLine = page.FindText("language. C#", TextFindParameter.None).Finds[0];

            //Calculate the line spacing
            float lineSpacing = secondLine.Bounds.Top - topLine.Bounds.Bottom;

            //Find the specific text in the last line
            PdfTextFind bottomLine = page.FindText("allocation of objects", TextFindParameter.None).Finds[0];

            //Get the height of the chunks 
            float height = bottomLine.Bounds.Bottom;

            //Create a font
            PdfFont font = new PdfFont(PdfFontFamily.TimesRoman, 11f);

            int i = 1;
            while (y < height)
            {
                //Draw line number before a specific line of text
                page.Canvas.DrawString(i.ToString(), font, PdfBrushes.Black, new PointF(15, y));
                y += lineHeight + lineSpacing;
                i++;
            }

            //Save the document
            doc.SaveToFile("result.pdf");
        }
    }
}

Imports Spire.Pdf
Imports Spire.Pdf.General.Find
Imports Spire.Pdf.Graphics
Imports System.Drawing
 
Namespace AddLineNumber
    Class Program
        Shared  Sub Main(ByVal args() As String)
            'Create a PdfDocument of instance
            Dim doc As PdfDocument =  New PdfDocument() 
 
            'Load a PDF document
            doc.LoadFromFile("G:\360MoveData\Users\Administrator\Desktop\sample.pdf")
 
            'Get the first page
            Dim page As PdfPageBase =  doc.Pages(0) 
 
            'Find the spcific text in the fisrt line
            Dim topLine As PdfTextFind =  page.FindText("C# (pronounced See Sharp)",TextFindParameter.None).Finds(0) 
 
            'Get the line height
            Dim lineHeight As single =  topLine.Bounds.Height 
 
            'Get the Y coordinate of the selected text
            Dim y As single =  topLine.Bounds.Y 
 
            'Find the spcific text in the second line
            Dim secondLine As PdfTextFind =  page.FindText("language. C#",TextFindParameter.None).Finds(0) 
 
            'Calculate the line spacing
            Dim lineSpacing As single =  secondLine.Bounds.Top - topLine.Bounds.Bottom 
 
            'Find the specific text in the last line
            Dim bottomLine As PdfTextFind =  page.FindText("allocation of objects",TextFindParameter.None).Finds(0) 
 
            'Get the height of the chunks 
            Dim height As single =  bottomLine.Bounds.Bottom 
 
            'Create a font
            Dim font As PdfFont =  New PdfFont(PdfFontFamily.TimesRoman,11f) 
 
            Dim i As Integer =  1 
            While y < height
                'Draw line number before a specific line of text
                page.Canvas.DrawString(i.ToString(),font,PdfBrushes.Black,New PointF(15,y))
                y += lineHeight + lineSpacing
                i = i + 1
            End While
 
            'Save the document
            doc.SaveToFile("result.pdf")
        End Sub
    End Class
End Namespace