PM> Install-Package Spire.Presentation

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;

namespace AddShapes
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Presentation class
            Presentation presentation = new Presentation();
            //Load a PowerPoint presentation
            presentation.LoadFromFile("Input.pptx");

            //Get the first slide
            ISlide slide = presentation.Slides[0];

            //Append a triangle shape to the slide
            IAutoShape shape = slide.Shapes.AppendShape(ShapeType.Triangle, new RectangleF(185, 130, 100, 100));
            //Fill the shape with solid color
            shape.Fill.FillType = FillFormatType.Solid;
            shape.Fill.SolidColor.Color = Color.LightGreen;
            //Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.White;

            //Append an ellipse shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.Ellipse, new RectangleF(370, 130, 150, 100));
            //Fill the shape with picture
            string picUrl = @"bg.png";
            shape.Fill.FillType = FillFormatType.Picture;
            shape.Fill.PictureFill.Picture.Url = picUrl;
            shape.Fill.PictureFill.FillType = PictureFillType.Stretch;
            //Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.CornflowerBlue;

            //Append a heart shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.Heart, new RectangleF(600, 130, 130, 100));
            //Add text to the shape
            shape.TextFrame.Text = "Heart";
            //Fill the shape with solid color
            shape.Fill.FillType = FillFormatType.Solid;
            shape.Fill.SolidColor.Color = Color.Red;
            //Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.LightGray;

            //Append a five-pointed star shape to the slide 
            shape = slide.Shapes.AppendShape(ShapeType.FivePointedStar, new RectangleF(160, 270, 150, 150));
            //Fill the shape with gradient color
            shape.Fill.FillType = FillFormatType.Gradient;
            shape.Fill.SolidColor.Color = Color.Black;
            //Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.White;

            //Append a rectangle shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.Rectangle, new RectangleF(400, 290, 100, 120));
            //Fill the shape with solid color
            shape.Fill.FillType = FillFormatType.Solid;
            shape.Fill.SolidColor.Color = Color.Pink;
            //Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.LightGray;

            //Append an arrow shape to the slide 
            shape = slide.Shapes.AppendShape(ShapeType.BentUpArrow, new RectangleF(600, 300, 150, 100));
            //Fill the shape with gradient color
            shape.Fill.FillType = FillFormatType.Gradient;
            shape.Fill.Gradient.GradientStops.Append(1f, KnownColors.Olive);
            shape.Fill.Gradient.GradientStops.Append(0, KnownColors.PowderBlue);
            //Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.White;

            //Save the result PowerPoint presentation
            presentation.SaveToFile("AddShapes_result.pptx", FileFormat.Pptx2010);
            presentation.Dispose();
        }
    }
}

Imports Spire.Presentation
Imports Spire.Presentation.Drawing
Imports System.Drawing

Namespace AddShapes
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Presentation class
            Dim presentation As Presentation = New Presentation()
            'Load a PowerPoint presentation
            presentation.LoadFromFile("Input.pptx")

            'Get the first slide
            Dim slide As ISlide = presentation.Slides(0)

            'Append a triangle shape to the slide
            Dim shape As IAutoShape = slide.Shapes.AppendShape(ShapeType.Triangle, New RectangleF(185, 130, 100, 100))
            'Fill the shape with solid color
            shape.Fill.FillType = FillFormatType.Solid
            shape.Fill.SolidColor.Color = Color.LightGreen
            'Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.White

            'Append an ellipse shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.Ellipse, New RectangleF(370, 130, 150, 100))
            'Fill the shape with picture
            Dim picUrl = "bg.png"
            shape.Fill.FillType = FillFormatType.Picture
            shape.Fill.PictureFill.Picture.Url = picUrl
            shape.Fill.PictureFill.FillType = PictureFillType.Stretch
            'Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.CornflowerBlue

            'Append a heart shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.Heart, New RectangleF(600, 130, 130, 100))
            'Add text to the shape
            shape.TextFrame.Text = "Heart"
            'Fill the shape with solid color
            shape.Fill.FillType = FillFormatType.Solid
            shape.Fill.SolidColor.Color = Color.Red
            'Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.LightGray

            'Append a five-pointed star shape to the slide 
            shape = slide.Shapes.AppendShape(ShapeType.FivePointedStar, New RectangleF(160, 270, 150, 150))
            'Fill the shape with gradient color
            shape.Fill.FillType = FillFormatType.Gradient
            shape.Fill.SolidColor.Color = Color.Black
            'Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.White

            'Append a rectangle shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.Rectangle, New RectangleF(400, 290, 100, 120))
            'Fill the shape with solid color
            shape.Fill.FillType = FillFormatType.Solid
            shape.Fill.SolidColor.Color = Color.Pink
            'Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.LightGray

            'Append an arrow shape to the slide
            shape = slide.Shapes.AppendShape(ShapeType.BentUpArrow, New RectangleF(600, 300, 150, 100))
            'Fill the shape with gradient color
            shape.Fill.FillType = FillFormatType.Gradient
            shape.Fill.Gradient.GradientStops.Append(1F, KnownColors.Olive)
            shape.Fill.Gradient.GradientStops.Append(0, KnownColors.PowderBlue)
            'Set the outline color for the shape
            shape.ShapeStyle.LineColor.Color = Color.White

            'Save the result PowerPoint presentation
            presentation.SaveToFile("AddShapes_result.pptx", FileFormat.Pptx2010)
            presentation.Dispose()
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Presentation

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;

namespace SolidBackground
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Presentation class
            Presentation ppt = new Presentation();
            //Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx");

            //Get the first slide
            ISlide slide = ppt.Slides[0];

            //Access the background of the slide
            SlideBackground background = slide.SlideBackground;

            //Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom;
            //Set the fill mode of the slide's background as a solid fill
            background.Fill.FillType = FillFormatType.Solid;
            //Set a color for the slide's background
            background.Fill.SolidColor.Color = Color.PaleTurquoise;

            //Save the result presentation
            ppt.SaveToFile("Solidbackground.pptx", FileFormat.Pptx2013);
            ppt.Dispose();
        }
    }
}

Imports Spire.Presentation
Imports Spire.Presentation.Drawing
Imports System.Drawing

Namespace SolidBackground
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Presentation class
            Dim ppt As Presentation = New Presentation()
            'Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx")

            'Get the first slide
            Dim slide As ISlide = ppt.Slides(0)

            'Access the background of the slide
            Dim background As SlideBackground = slide.SlideBackground

            'Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom
            'Set the fill mode of the slide's background as a solid fill
            background.Fill.FillType = FillFormatType.Solid
            'Set a color for the slide's background
            background.Fill.SolidColor.Color = Color.PaleTurquoise

            'Save the result presentation
            ppt.SaveToFile("Solidbackground.pptx", FileFormat.Pptx2013)
            ppt.Dispose()
        End Sub
    End Class
End Namespace

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;

namespace GradientBackground
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Presentation class
            Presentation ppt = new Presentation();
            //Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx");

            //Get the first slide
            ISlide slide = ppt.Slides[0];

            //Access the background of the slide
            SlideBackground background = slide.SlideBackground;

            //Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom;
            //Set the fill mode of the slide's background as a gradient fill
            background.Fill.FillType = FillFormatType.Gradient;

            //Set gradient stops and colors
            background.Fill.Gradient.GradientStops.Append(0.1f, Color.LightCyan);
            background.Fill.Gradient.GradientStops.Append(0.7f, Color.LightSeaGreen);

            //Set the shape type of the gradient fill
            background.Fill.Gradient.GradientShape = GradientShapeType.Linear;
            //Set the angle of the gradient fill
            background.Fill.Gradient.LinearGradientFill.Angle = 45;

            //Save the result presentation
            ppt.SaveToFile("Gradientbackground.pptx", FileFormat.Pptx2013);
            ppt.Dispose();
        }
    }
}

Imports Spire.Presentation
Imports Spire.Presentation.Drawing
Imports System.Drawing

Namespace GradientBackground
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Presentation class
            Dim ppt As Presentation = New Presentation()
            'Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx")

            'Get the first slide
            Dim slide As ISlide = ppt.Slides(0)

            'Access the background of the slide
            Dim background As SlideBackground = slide.SlideBackground

            'Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom
            'Set the fill mode of the slide's background as a gradient fill
            background.Fill.FillType = FillFormatType.Gradient

            'Set gradient stops and colors
            background.Fill.Gradient.GradientStops.Append(0.1F, Color.LightCyan)
            background.Fill.Gradient.GradientStops.Append(0.7F, Color.LightSeaGreen)

            'Set the shape type of the gradient fill
            background.Fill.Gradient.GradientShape = GradientShapeType.Linear
            'Set the angle of the gradient fill
            background.Fill.Gradient.LinearGradientFill.Angle = 45

            'Save the result presentation
            ppt.SaveToFile("Gradientbackground.pptx", FileFormat.Pptx2013)
            ppt.Dispose()
        End Sub
    End Class
End Namespace

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;

namespace PictureBackground
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Presentation class
            Presentation ppt = new Presentation();
            //Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx");

            //Get the first slide
            ISlide slide = ppt.Slides[0];

            //Access the background of the slide
            SlideBackground background = slide.SlideBackground;

            //Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom;
            //Set the fill mode of the slide's background as a picture fill
            background.Fill.FillType = FillFormatType.Picture;

            Image img = Image.FromFile("bg.jpg");
            //Add an image to the image collection of the presentation
            IImageData image = ppt.Images.Append(img);
            //Set the image as the slide's background
            background.Fill.PictureFill.FillType = PictureFillType.Stretch;
            background.Fill.PictureFill.Picture.EmbedImage = image;

            //Save the result presentation
            ppt.SaveToFile("Picturebackground.pptx", FileFormat.Pptx2013);
            ppt.Dispose();
        }
    }
}

Imports Spire.Presentation
Imports Spire.Presentation.Drawing

Namespace PictureBackground
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Presentation class
            Dim ppt As Presentation = New Presentation()
            'Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx")

            'Get the first slide
            Dim slide As ISlide = ppt.Slides(0)

            'Access the background of the slide
            Dim background As SlideBackground = slide.SlideBackground

            'Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom
            'Set the fill mode of the slide's background as a picture fill
            background.Fill.FillType = FillFormatType.Picture

            Dim img As Image = Image.FromFile("bg.jpg")
            'Add an image to the image collection of the presentation
            Dim image As IImageData = ppt.Images.Append(img)
            'Set the image as the slide's background
            background.Fill.PictureFill.FillType = PictureFillType.Stretch
            background.Fill.PictureFill.Picture.EmbedImage = image

            'Save the result presentation
            ppt.SaveToFile("Picturebackground.pptx", FileFormat.Pptx2013)
            ppt.Dispose()
        End Sub
    End Class
End Namespace

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;

namespace AddBackgroundToSlideMaster
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Presentation class
            Presentation ppt = new Presentation();
            //Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx");

            //Get the first slide master
            IMasterSlide slide = ppt.Masters[0];

            //Access the background of the slide
            SlideBackground background = slide.SlideBackground;

            //Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom;
            //Set the fill mode of the slide's background as a solid fill
            background.Fill.FillType = FillFormatType.Solid;
            //Set a color for the slide's background
            background.Fill.SolidColor.Color = Color.PeachPuff;

            //Save the result presentation
            ppt.SaveToFile("AddBackgroundToSlideMaster.pptx", FileFormat.Pptx2013);
            ppt.Dispose();

        }
    }
}

Imports Spire.Presentation
Imports Spire.Presentation.Drawing
Imports System.Drawing

Namespace AddBackgroundToSlideMaster
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Presentation class
            Dim ppt As Presentation = New Presentation()
            'Load a PowerPoint presentation
            ppt.LoadFromFile("Sample.pptx")

            'Get the first slide master
            Dim slide As IMasterSlide = ppt.Masters(0)

            'Access the background of the slide
            Dim background As SlideBackground = slide.SlideBackground

            'Set the type of the slide's background as a custom type
            background.Type = BackgroundType.Custom
            'Set the fill mode of the slide's background as a solid fill
            background.Fill.FillType = FillFormatType.Solid
            'Set a color for the slide's background
            background.Fill.SolidColor.Color = Color.PeachPuff

            'Save the result presentation
            ppt.SaveToFile("AddBackgroundToSlideMaster.pptx", FileFormat.Pptx2013)
            ppt.Dispose()

        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Presentation

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;

namespace InsertImageFromDisk
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Presentation object
            Presentation presentation = new Presentation();

            // Load a PowerPoint file
            presentation.LoadFromFile("C:\\Users\\Administrator\\Desktop\\input.pptx");

            // Load an image from the given file path
            Image img = Image.FromFile("C:\\Users\\Administrator\\Desktop\\logo.png");

            // Add the image to the image collection of the document
            IImageData image = presentation.Images.Append(img);

            // Get the image width and height
            int width =  image.Width;
            int height = image.Height;

            // Specify the image position in the slide
            int x = 100;
            int y = 100;

            // Get a specific slide
            ISlide slide = presentation.Slides[0];

            // Insert the image to the slide at the specified position
            RectangleF rect = new RectangleF(x, y, width, height);
            IEmbedImage imageShape = slide.Shapes.AppendEmbedImage(ShapeType.Rectangle, image, rect);

            // Set the line fill type of the image shape to none
            imageShape.Line.FillType = FillFormatType.None;

            // Save the presentation to a different file
            presentation.SaveToFile("InsertImage.pptx", FileFormat.Pptx2010);

            // Dispose resources
            presentation.Dispose();
        }
    }
}

using Spire.Presentation;
using Spire.Presentation.Drawing;
using System.Drawing;
using System.Net;

namespace InsertImageFromUrl
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Presentation object
            Presentation presentation = new Presentation();

            // Load a PowerPoint file
            presentation.LoadFromFile("C:\\Users\\Administrator\\Desktop\\input.pptx");

            // Declare a variable
            Image img;

            // Read an image from a URL
            string imageUrl = "https://i.imgur.com/OygmMoN.png";
            using (WebClient webClient = new WebClient())
            {
                using (Stream stream = webClient.OpenRead(imageUrl))
                {
                    // Load the image from stream
                    img =  Image.FromStream(stream);
                }
            }

            // Add the image to the image collection of the document
            IImageData image = presentation.Images.Append(img);

            // Get the image width and height
            int width = image.Width;
            int height = image.Height;

            // Specify the image position in the slide
            int x = 100;
            int y = 100;

            // Get a specific slide
            ISlide slide = presentation.Slides[0];

            // Insert the image to the slide at the specified position
            RectangleF rect = new RectangleF(x, y, width, height);
            IEmbedImage imageShape = slide.Shapes.AppendEmbedImage(ShapeType.Rectangle, image, rect);

            // Set the line fill type of the image shape to none
            imageShape.Line.FillType = FillFormatType.None;

            // Save the presentation to a different file
            presentation.SaveToFile("InsertImage.pptx", FileFormat.Pptx2010);

            // Dispose resources
            presentation.Dispose();
        }
    }
}

PM> Install-Package Spire.Presentation

using Spire.Presentation;

namespace ProtectPPTWithPassword
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Presentation instance
            Presentation presentation = new Presentation();

            //Load a PowerPoint document
            presentation.LoadFromFile(@"Sample.pptx");

            //Encrypt the document with a password
            presentation.Encrypt("your password");

            //Save the result document
            presentation.SaveToFile("Encrypted.pptx", FileFormat.Pptx2013);
        }
    }
}

Imports Spire.Presentation

Namespace ProtectPPTWithPassword
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Create a Presentation instance
            Dim presentation As Presentation = New Presentation()

            'Load a PowerPoint document
            presentation.LoadFromFile("Sample.pptx")

            'Encrypt the document with a password
            presentation.Encrypt("your password")

            'Save the result document
            presentation.SaveToFile("Encrypted.pptx", FileFormat.Pptx2013)
        End Sub
    End Class
End Namespace

using Spire.Presentation;

namespace MarkPPTAsFinal
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Presentation instance
            Presentation ppt = new Presentation();
            //Load a PowerPoint document
            ppt.LoadFromFile(@"Sample.pptx");

            //Mark the document as final
            ppt.DocumentProperty["_MarkAsFinal"] = true;

            //Save the result document
            ppt.SaveToFile("MarkAsFinal.pptx", FileFormat.Pptx2013);
        }
    }
}

Imports Spire.Presentation

Namespace MarkPPTAsFinal
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Create a Presentation instance
            Dim ppt As Presentation = New Presentation()
            'Load a PowerPoint document
            ppt.LoadFromFile("Sample.pptx")

            'Mark the document as final
            ppt.DocumentProperty("_MarkAsFinal") = True

            'Save the result document
            ppt.SaveToFile("MarkAsFinal.pptx", FileFormat.Pptx2013)
        End Sub
    End Class
End Namespace

using Spire.Presentation;

namespace RemovePasswordProtectionFromPPT
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Presentation instance
            Presentation presentation = new Presentation();

            //Load a password-protected PowerPoint document with the right password
            presentation.LoadFromFile(@"Encrypted.pptx", "your password");

            //Remove password protection from the document
            presentation.RemoveEncryption();

            //Save the result document
            presentation.SaveToFile("RemoveProtection.pptx", FileFormat.Pptx2013);
        }
    }
}

Imports Spire.Presentation

Namespace RemovePasswordProtectionFromPPT
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Create a Presentation instance
            Dim presentation As Presentation = New Presentation()

            'Load a password-protected PowerPoint document with the right password
            presentation.LoadFromFile("Encrypted.pptx", "your password")

            'Remove password protection from the document
            presentation.RemoveEncryption()

            'Save the result document
            presentation.SaveToFile("RemoveProtection.pptx", FileFormat.Pptx2013)
        End Sub
    End Class
End Namespace

using Spire.Presentation;

namespace RemoveMarkAsFinalFromPPT
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Presentation instance
            Presentation ppt = new Presentation();
            //Load a PowerPoint document
            ppt.LoadFromFile(@"MarkAsFinal.pptx");

            //Remove mark as final option from the document
            ppt.DocumentProperty["_MarkAsFinal"] = false;

            //Save the result document
            ppt.SaveToFile("RemoveMarkAsFinal.pptx", FileFormat.Pptx2013);
        }
    }
}

Imports Spire.Presentation

Namespace RemoveMarkAsFinalFromPPT
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Create a Presentation instance
            Dim ppt As Presentation = New Presentation()
            'Load a PowerPoint document
            ppt.LoadFromFile("MarkAsFinal.pptx")

            'Remove mark as final option from the document
            ppt.DocumentProperty("_MarkAsFinal") = False

            'Save the result document
            ppt.SaveToFile("RemoveMarkAsFinal.pptx", FileFormat.Pptx2013)
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Presentation

using Spire.Presentation;

namespace InsertTable
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Initialize an instance of the Presentation class
            Presentation presentation = new Presentation();
            //Load a PowerPoint presentation
            presentation.LoadFromFile(@"Input.pptx");

            //Get the first slide
            ISlide slide = presentation.Slides[0];

            //Define two double arrays, widths and heights, which specify the number and size of rows and columns in table
            double[] widths = new double[] { 100, 100, 150, 100, 100 };
            double[] heights = new double[] { 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15 };

            //Add a table with the specified number and size of rows and columns to a specific position on the slide
            ITable table = slide.Shapes.AppendTable(presentation.SlideSize.Size.Width / 2 - 275, 90, widths, heights);

            //Store table data in a two-dimensional string array
            string[,] data = new string[,]{
            {"Name", "Capital", "Continent", "Area", "Population"},
            {"Venezuela", "Caracas", "South America", "912047", "19700000"},
            {"Bolivia", "La Paz", "South America", "1098575", "7300000"},
            {"Brazil", "Brasilia", "South America", "8511196", "150400000"},
            {"Canada", "Ottawa", "North America", "9976147", "26500000"},
            {"Chile", "Santiago", "South America", "756943", "13200000"},
            {"Colombia", "Bogota", "South America", "1138907", "33000000"},
            {"Cuba", "Havana", "North America", "114524", "10600000"},
            {"Ecuador", "Quito", "South America", "455502", "10600000"},
            {"Paraguay", "Asuncion", "South America", "406576", "4660000"},
            {"Peru", "Lima", "South America", "1285215", "21600000"},
            {"Jamaica", "Kingston", "North America", "11424", "2500000"},
            {"Mexico", "Mexico City", "North America", "1967180", "88600000"}
            };

            //Loop through the string array and assign data to each cell of the table
            for (int i = 0; i < 13; i++)
                for (int j = 0; j < 5; j++)
                {
                    //Fill each cell of the table with data
                    table[j, i].TextFrame.Text = data[i, j];
                    //Set font name and font size
                    table[j, i].TextFrame.Paragraphs[0].TextRanges[0].LatinFont = new TextFont("Times New Roman");
                    table[j, i].TextFrame.Paragraphs[0].TextRanges[0].FontHeight = 16;
                }

            //Set the alignment of the first row of the table to center
            for (int i = 0; i < 5; i++)
            {
                table[i, 0].TextFrame.Paragraphs[0].Alignment = TextAlignmentType.Center;
            }

            //Apply a style to the table
            table.StylePreset = TableStylePreset.MediumStyle2Accent6;

            //Save the presentation to a file
            presentation.SaveToFile("InsertTable.pptx", FileFormat.Pptx2013);
            presentation.Dispose();
        }
    }
}

Imports Spire.Presentation

Namespace InsertTable
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Initialize an instance of the Presentation class
            Dim presentation As Presentation = New Presentation()
            'Load a PowerPoint presentation
            presentation.LoadFromFile("Input.pptx")

            'Get the first slide
            Dim slide As ISlide = presentation.Slides(0)

            'Define two double arrays, widths and heights, which specify the number and size of rows and columns in table
            Dim widths = New Double() {100, 100, 150, 100, 100}
            Dim heights = New Double() {15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15}

            'Add a table with the specified number and size of rows and columns to a specific position on the slide
            Dim table As ITable = slide.Shapes.AppendTable(presentation.SlideSize.Size.Width / 2 - 275, 90, widths, heights)

            'Store table data in a two-dimensional string array
            Dim data = New String(,) {
            {"Name", "Capital", "Continent", "Area", "Population"},
            {"Venezuela", "Caracas", "South America", "912047", "19700000"},
            {"Bolivia", "La Paz", "South America", "1098575", "7300000"},
            {"Brazil", "Brasilia", "South America", "8511196", "150400000"},
            {"Canada", "Ottawa", "North America", "9976147", "26500000"},
            {"Chile", "Santiago", "South America", "756943", "13200000"},
            {"Colombia", "Bogota", "South America", "1138907", "33000000"},
            {"Cuba", "Havana", "North America", "114524", "10600000"},
            {"Ecuador", "Quito", "South America", "455502", "10600000"},
            {"Paraguay", "Asuncion", "South America", "406576", "4660000"},
            {"Peru", "Lima", "South America", "1285215", "21600000"},
            {"Jamaica", "Kingston", "North America", "11424", "2500000"},
                        {"Mexico", "Mexico City", "North America", "1967180", "88600000"}}

            'Loop through the string array and assign data to each cell of the table
            For i = 0 To 12
                For j = 0 To 4
                    'Fill each cell of the table with data
                    table(j, i).TextFrame.Text = data(i, j)
                    'Set font name and font size
                    table(j, i).TextFrame.Paragraphs(0).TextRanges(0).LatinFont = New TextFont("Times New Roman")
                    table(j, i).TextFrame.Paragraphs(0).TextRanges(0).FontHeight = 16
                Next
            Next

            'Set the alignment of the first row of the table to center
            For i = 0 To 4
                table(i, 0).TextFrame.Paragraphs(0).Alignment = TextAlignmentType.Center
            Next

            'Apply a style to the table
            table.StylePreset = TableStylePreset.MediumStyle2Accent6

            'Save the presentation to a file
            presentation.SaveToFile("InsertTable.pptx", FileFormat.Pptx2013)
            presentation.Dispose()
        End Sub
    End Class
End Namespace

PM> Install-Package Spire.Doc

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

namespace MergeTableCells
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document document = new Document();
            //Load a Word document
            document.LoadFromFile("Input.docx");

            //Get the first section
            Section section = document.Sections[0];

            //Add a 4 x 4 table to the section
            Table table = section.AddTable();
            table.ResetCells(4, 4);

            //Horizontally merge cells 1, 2, 3, and 4 in the first row
            table.ApplyHorizontalMerge(0, 0, 3);
            //Vertically merge cells 3 and 4 in the first column
            table.ApplyVerticalMerge(0, 2, 3);

            //Add some data to the table
            for (int row = 0; row < table.Rows.Count; row++)
            {
                for (int col = 0; col < table.Rows[row].Cells.Count; col++)
                {
                    TableCell cell = table[row, col];
                    cell.CellFormat.VerticalAlignment = VerticalAlignment.Middle;
                    Paragraph paragraph = cell.AddParagraph();
                    paragraph.Format.HorizontalAlignment = HorizontalAlignment.Center;
                    paragraph.Text = "Text";
                }
            }

            //Apply a style to the table
            table.ApplyStyle(DefaultTableStyle.LightGridAccent1);

            //Save the result document
            document.SaveToFile("MergeCells.docx", FileFormat.Docx2013);
        }
    }
}

Imports Spire.Doc
Imports Spire.Doc.Documents

Namespace MergeTableCells
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Create a Document instance
            Dim document As Document = New Document()
            'Load a Word document
            document.LoadFromFile("Input.docx")

            'Get the first section
            Dim section As Section = document.Sections(0)

            'Add a 4 x 4 table to the section
            Dim table As Table = section.AddTable()
            table.ResetCells(4, 4)

            'Horizontally merge cells 1, 2, 3, and 4 in the first row
            table.ApplyHorizontalMerge(0, 0, 3)
            'Vertically merge cells 3 and 4 in the first column
            table.ApplyVerticalMerge(0, 2, 3)

            'Add some data to the table
            For row As Integer = 0 To table.Rows.Count - 1
                For col As Integer = 0 To table.Rows(row).Cells.Count - 1
                    Dim cell As TableCell = table(row, col)
                    cell.CellFormat.VerticalAlignment = VerticalAlignment.Middle
                    Dim paragraph As Paragraph = cell.AddParagraph()
                    paragraph.Format.HorizontalAlignment = HorizontalAlignment.Center
                    paragraph.Text = "Text"
                Next
            Next

            'Apply a style to the table
            table.ApplyStyle(DefaultTableStyle.LightGridAccent1)

            'Save the result document
            document.SaveToFile("MergeCells.docx", FileFormat.Docx2013)
        End Sub
    End Class
End Namespace

using Spire.Doc;

namespace SplitTableCells
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document document = new Document();
            //Load a Word Document
            document.LoadFromFile("MergeCells.docx");

            //Get the first section
            Section section = document.Sections[0];

            //Get the first table in the section
            Table table = section.Tables[0] as Table;

            //Get the 4th cell in the 4th row
            TableCell cell1 = table.Rows[3].Cells[3];
            //Split the cell into 2 columns and 2 rows
            cell1.SplitCell(2, 2);

            //save the result document
            document.SaveToFile("SplitCells.docx", FileFormat.Docx2013);
        }
    }
}

Imports Spire.Doc

Namespace SplitTableCells
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            'Create a Document instance
            Dim document As Document = New Document()
            'Load a Word Document
            document.LoadFromFile("MergeCells.docx")

            'Get the first section
            Dim section As Section = document.Sections(0)

            'Get the first table in the section
            Dim table As Table = TryCast(section.Tables(0), Table)

            'Get the 4th cell in the 4th row
            Dim cell1 As TableCell = table.Rows(3).Cells(3)
            'Split the cell into 2 columns and 2 rows
            cell1.SplitCell(2, 2)

            'save the result document
            document.SaveToFile("SplitCells.docx", FileFormat.Docx2013)
        End Sub
    End Class
End Namespace