Interface IParagraph

Represents a paragraph in the shape.

Namespace: Syncfusion.Presentation

Assembly: Syncfusion.Presentation.NET.dll

Syntax

public interface IParagraph

Properties

EndParagraphFont

Declaration

IFont EndParagraphFont { get; }

Property Value

Type
IFont

FirstLineIndent

Gets or sets the first line indent of the paragraph, in points.

Declaration

double FirstLineIndent { get; set; }

Property Value

Type
System.Double

Examples

//Create a new presentation instance.
IPresentation presentation = Presentation.Create();
//Add the slide into the presentation
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
// Add a text box to hold the list
IShape textBoxShape = slide.AddTextBox(65, 140, 410, 270);
// Add a new paragraph with the text in the left hand side text box.
IParagraph paragraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.");
// Set the hanging value
paragraph.FirstLineIndent = 20;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation instance.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add the slide into the presentation
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
' Add a text box to hold the list
Dim textBoxShape As IShape = slide.AddTextBox(65, 140, 410, 270)
' Add a new paragraph with the text in the left hand side text box.
Dim paragraph As IParagraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.")
' Set the hanging value
paragraph.FirstLineIndent = 20
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

Font

Gets an IFont instance of the paragraph. Read-only.

Declaration

IFont Font { get; }

Property Value

Type
IFont

Examples

//Create a new presentation instance.
IPresentation presentation = Presentation.Create();
//Add the slide into the presentation
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
// Add a text box to hold the list
IShape textBoxShape = slide.AddTextBox(65, 140, 410, 270);
// Add a new paragraph with the text in the left hand side text box.
IParagraph paragraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.");
//Retrieve the paragraph font
IFont font = paragraph.Font;
//Set the font size
font.FontSize = 26;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation instance.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add the slide into the presentation
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
' Add a text box to hold the list
Dim textBoxShape As IShape = slide.AddTextBox(65, 140, 410, 270)
' Add a new paragraph with the text in the left hand side text box.
Dim paragraph As IParagraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.")
'Retrieve the paragraph font
Dim font As IFont = paragraph.Font
'Set the font size
font.FontSize = 26
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

HorizontalAlignment

Gets or sets the horizontal alignment of the paragraph.

Declaration

HorizontalAlignmentType HorizontalAlignment { get; set; }

Property Value

Type
HorizontalAlignmentType

Examples

//Create a new presentation instance.
IPresentation presentation = Presentation.Create();
//Add the slide into the presentation
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
// Add a text box to hold the list
IShape textBoxShape = slide.AddTextBox(65, 140, 410, 270);
// Add a new paragraph with the text in the left hand side text box.
IParagraph paragraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.");
//Set the horizontal alignment 
paragraph.HorizontalAlignment = HorizontalAlignmentType.Justify;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation instance.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add the slide into the presentation
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
' Add a text box to hold the list
Dim textBoxShape As IShape = slide.AddTextBox(65, 140, 410, 270)
' Add a new paragraph with the text in the left hand side text box.
Dim paragraph As IParagraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.")
'Set the horizontal alignment 
paragraph.HorizontalAlignment = HorizontalAlignmentType.Justify
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

IndentLevelNumber

Gets or sets the indent level as an integer from 0 to 8, where 0 indicates a first-level paragraph with no indentation.

Declaration

int IndentLevelNumber { get; set; }

Property Value

Type
System.Int32

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart");
//Create instance for text part
ITextPart textPart = paragraph.AddTextPart();
//Set text for the text part
textPart.Text = " First Paragraph, second Textpart";
//Set the list level as 1
paragraph.IndentLevelNumber = 1;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Add first paragraph to the text body
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart")
'Create instance for text part
Dim text part As ITextPart = paragraph.AddTextPart()
'Set text for the text part
text part.Text = " First Paragraph, second Textpart"
'Set the list level as 1
paragraph.IndentLevelNumber = 1
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

LeftIndent

Gets or sets the left indent of the paragraph, in points.

Declaration

double LeftIndent { get; set; }

Property Value

Type
System.Double

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);           
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart");
//Set the left indent 
paragraph.LeftIndent = 20;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Add first paragraph to the text body
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart")
'Set the left indent 
paragraph.LeftIndent = 20
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

LineSpacing

Gets or sets the line spacing, in points.

Declaration

double LineSpacing { get; set; }

Property Value

Type
System.Double

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);           
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart");
//Set line spacing for paragraph
paragraph.LineSpacing = 20;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Add first paragraph to the text body
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart")
'Set line spacing for paragraph
paragraph.LineSpacing = 20
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

ListFormat

Gets an IListFormat instance that represents the list formatting for the specified paragraph. Read-only.

Declaration

IListFormat ListFormat { get; }

Property Value

Type
IListFormat

Examples

//Create a new presentation instance.
IPresentation presentation = Presentation.Create();
//Add the slide into the presentation
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
// Add a text box to hold the list
IShape textBoxShape = slide.AddTextBox(65, 140, 410, 270);
// Add a new paragraph with the text in the left hand side text box.
IParagraph paragraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.");
//Get the list format of paragraph, read only
IListFormat listFormat = paragraph.ListFormat;
//Set the list type
listFormat.Type = ListType.Bulleted;
//Set the character for bullet
listFormat.BulletCharacter = 'â™ ';
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation instance.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add the slide into the presentation
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
' Add a text box to hold the list
Dim textBoxShape As IShape = slide.AddTextBox(65, 140, 410, 270)
' Add a new paragraph with the text in the left hand side text box.
Dim paragraph As IParagraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.")
'Get the list format of paragraph, read only
Dim listFormat As IListFormat = paragraph.ListFormat
'Set the list type
listFormat.Type = ListType.Bulleted
'Set the character for bullet
listFormat.BulletCharacter = "â™ "C
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

SpaceAfter

Gets or sets the amount of space after the last line in each paragraph of the specified text, in points.

Declaration

double SpaceAfter { get; set; }

Property Value

Type
System.Double

Examples

//Create a new presentation instance.
IPresentation presentation = Presentation.Create();
//Add the slide into the presentation
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
// Add a text box to hold the list
IShape textBoxShape = slide.AddTextBox(65, 140, 410, 270);
// Add a new paragraph with the text in the left hand side text box.
IParagraph paragraph1 = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.");
//Add another paragraph.
IParagraph paragraph2 = textBoxShape.TextBody.AddParagraph("The company manufactures and sells metal and composite bicycles to North American, European and Asian commercial markets.");
//Set space after 
paragraph1.SpaceAfter = 30;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation instance.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add the slide into the presentation
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
' Add a text box to hold the list
Dim textBoxShape As IShape = slide.AddTextBox(65, 140, 410, 270)
' Add a new paragraph with the text in the left hand side text box.
Dim paragraph1 As IParagraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.")
'Add another paragraph.
Dim paragraph2 As IParagraph = textBoxShape.TextBody.AddParagraph("The company manufactures and sells metal and composite bicycles to North American, European and Asian commercial markets.")
'Set space after 
paragraph1.SpaceAfter = 30
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

SpaceBefore

Gets or sets the amount of space before the first line in each paragraph of the specified text, in points.

Declaration

double SpaceBefore { get; set; }

Property Value

Type
System.Double

Examples

//Create a new presentation instance.
IPresentation presentation = Presentation.Create();
//Add the slide into the presentation
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
// Add a text box to hold the list
IShape textBoxShape = slide.AddTextBox(65, 140, 410, 270);
// Add a new paragraph with the text in the left hand side text box.
IParagraph paragraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.");
//Set space before 
paragraph.SpaceBefore = 10;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation instance.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add the slide into the presentation
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
' Add a text box to hold the list
Dim textBoxShape As IShape = slide.AddTextBox(65, 140, 410, 270)
' Add a new paragraph with the text in the left hand side text box.
Dim paragraph As IParagraph = textBoxShape.TextBody.AddParagraph("AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.")
'Set space before 
paragraph.SpaceBefore = 10
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

Text

Gets the text content of the paragraph. Read-only.

Declaration

string Text { get; set; }

Property Value

Type
System.String

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart");
//Add text part to the paragraph
ITextPart textPart = paragraph.AddTextPart();
//Set text for the text part
textPart.Text = " First Paragraph, second Textpart";
//Get the paragraph text, it is read only 
string entireText = paragraph.Text;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Add first paragraph to the text body
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart")
'Add text part to the paragraph
Dim text part As ITextPart = paragraph.AddTextPart()
'Set text for the text part
text part.Text = " First Paragraph, second Textpart"
'Get the paragraph text, it is read only 
Dim entireText As String = paragraph.Text
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

TextParts

Gets the text part collection of ITextParts instance. Read-only.

Declaration

ITextParts TextParts { get; }

Property Value

Type
ITextParts

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);           
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart");
//Create instance for text part
ITextPart textPart = paragraph.AddTextPart();
//Set text for the text part
textPart.Text = " First Paragraph, second Textpart";
//Get the collection of text part in a paragraph, it is read only
ITextParts textParts = paragraph.TextParts;
//Set the first text part with bold style
textParts[0].Font.Bold = true;
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Add first paragraph to the text body
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart")
'Create instance for text part
Dim text part As ITextPart = paragraph.AddTextPart()
'Set text for the text part
text part.Text = " First Paragraph, second Textpart"
'Get the collection of text part in a paragraph, it is read only
Dim text parts As ITextParts = paragraph.TextParts
'Set the first text part with bold style
text parts(0).Font.Bold = True
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

Methods

AddHyperlink(String, String)

Adds the hyperlink to the textpart with the specified link.

Declaration

IHyperLink AddHyperlink(string textToDisplay, string link)

Parameters

Type	Name	Description
System.String	textToDisplay	The text content to initialize the new ITextPart instance.
System.String	link	Represents the address of the target document path or web url.

Returns

Type	Description
IHyperLink	Returns an IHyperLink instance.

Examples

//Create a new presentation.
IPresentation ppDoc = Presentation.Create();
//Add a slide to the presentation.
ISlide slide = ppDoc.Slides.Add(SlideLayoutType.Blank);
//Add a rectangle to the slide
IShape shape = slide.Shapes.AddShape(AutoShapeType.Rectangle, 100, 100, 100, 100);
//Add paragraph into the shape
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add hyperlink to the TextPart and screen tip to the hyperlink.
IHyperLink hyperLink = paragraph.AddHyperlink("Google", "https://www.google.com");
hyperLink.ScreenTip = "This hyperlink navigates to Google site";
//Save the presentation
ppDoc.Save("Sample.pptx");
//Close the presentation
ppDoc.Close();

///

'Create a new presentation.
Dim ppDoc As IPresentation = Presentation.Create()
'Add a slide into the presentation
Dim slide As ISlide = ppDoc.Slides.Add(SlideLayoutType.Blank)
'Add a rectangle to the slide
Dim shape As IShape = slide.Shapes.AddShape(AutoShapeType.Rectangle, 100, 100, 100, 100)
'Adds paragraph into the shape
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add hyperlink to the TextPart and screen tip to the hyperlink.
Dim hyperLink As IHyperLink = paragraph.AddHyperlink("Google", "https://www.google.com")
hyperLink.ScreenTip = "This hyperlink navigates to Google site"
'Saves the Presentation.
ppDoc.Save("Sample.pptx")
'Close the presentation.
ppDoc.Close()

AddTextPart()

Adds a text part to the text part collection.

Declaration

ITextPart AddTextPart()

Returns

Type	Description
ITextPart	Returns an ITextPart instance this method creates.

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Create instance for text part
ITextPart textPart = paragraph.AddTextPart();
//Set text for the text part
textPart.Text = " First Paragraph, second Textpart";
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Create instance for text part
Dim text part As ITextPart = paragraph.AddTextPart()
'Set text for the text part
text part.Text = " First Paragraph, second Textpart"
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

AddTextPart(String)

Adds a text part to the text part collection with the specified text.

Declaration

ITextPart AddTextPart(string text)

Parameters

Type	Name	Description
System.String	text	The text content to initialize the new ITextPart instance.

Returns

Type	Description
ITextPart	Returns an ITextPart instance this method creates.

Examples

//Create a new presentation.
IPresentation presentation = Presentation.Create();
//Add a blank slide to the presentation.
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a text box to the slide
IShape shape = slide.Shapes.AddTextBox(100, 150, 300, 350);
//Add first paragraph to the text body
IParagraph paragraph = shape.TextBody.AddParagraph();
//Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart");
//Save the presentation
presentation.Save("Sample.pptx");
//Close the presentation
presentation.Close();

'Create a new presentation.
Dim presentation__1 As IPresentation = Presentation.Create()
'Add a blank slide to the presentation.
Dim slide As ISlide = presentation__1.Slides.Add(SlideLayoutType.Blank)
'Add a text box to the slide
Dim shape As IShape = slide.Shapes.AddTextBox(100, 150, 300, 350)
'Add first paragraph to the text body
Dim paragraph As IParagraph = shape.TextBody.AddParagraph()
'Add first text part to the paragraph
paragraph.AddTextPart("First Paragraph, First Textpart")
'Save the presentation
presentation__1.Save("Sample.pptx")
'Close the presentation
presentation__1.Close()

Clone()

Creates an independent copy of IParagraph instance.

Declaration

IParagraph Clone()

Returns

Type	Description
IParagraph	Returns the cloned paragraph instance.

Examples

//Open an existing presentation.
IPresentation presentation = Presentation.Open("Presentation.pptx");
//Retrieve the slide instance.
ISlide slide = presentation.Slides[0];
//Add a new text box to the slide.
IShape textboxShape = slide.AddTextBox(0, 0, 250, 250);
//Add a paragraph with text content to the shape.
IParagraph paragraph = textboxShape.TextBody.AddParagraph("Hello Presentation");
//Create a cloned copy of paragraph.
IParagraph clonedParagraph = paragraph.Clone();
clonedParagraph.TextParts[0].Text = "Replaced text";
//Save the presentation to the file system.
presentation.Save("Output.pptx");
//Close the presentation
presentation.Close();

'Open an existing presentation.
Dim presentation__1 As IPresentation = Presentation.Open("Presentation.pptx")
'Retrieve the slide instance.
Dim slide As ISlide = presentation__1.Slides(0)
'Add a new text box to the cloned slide.
Dim textboxShape As IShape = slide.AddTextBox(0, 0, 250, 250)
'Add a paragraph with text content to the shape.
Dim paragraph As IParagraph = textboxShape.TextBody.AddParagraph("Hello Presentation")
'Create a cloned copy of paragraph.
Dim clonedParagraph As IParagraph = paragraph.Clone();
clonedParagraph.TextParts[0].Text = "Replaced Text";
'Add the slide to the presentation.
presentation__1.Slides.Add(slideClone)
'Save the presentation to the file system.
presentation__1.Save("Output.pptx")
'Close the presentation
presentation__1.Close()