Como adicionar slides no PowerPoint

using IronPPT;

// Instantiate a new PresentationDocument object
var document = new PresentationDocument();

// Add a slide to the presentation
document.AddSlide();

// Export the presentation to a PPTX file
document.Save("addSlides.pptx");

using IronPPT;

// Create a new presentation document
var document = new PresentationDocument();

// Create a new slide object
var slide = new Slide();

// Add text to the slide
slide.AddText("Hello World!");

// Add the slide object to the document using the AddSlide method
document.AddSlide(slide);

// Save the presentation as a PPTX file
document.Save("adding-slide-object.pptx");

using IronPPT;

// Loading an existing PPTX file
var document = new PresentationDocument("adding-slide-object.pptx");

// Add 3 new slides to the presentation
for (int i = 0; i < 3; i++) {
    document.AddSlide();
}

// Export the file
document.Save("addSlides.pptx");