รวม Powerpoint, PDF, PPT หรือเอกสารอื่นๆ เข้าด้วยกันใน C#

// Instantiate a Presentation object that represents a target presentation file
using (Presentation presentation1 = new Presentation("presentation1.pptx"))
{
    // Instantiate a Presentation object that represents a source presentation file
    using (Presentation presentation2 = new Presentation("presentation2.pptx"))
    {
        foreach (ISlide slide in presentation2.Slides)
        {
            // Merge slides from source to target 
            presentation1.Slides.AddClone(slide);
        }
    }
    // Save the presentation
    presentation1.Save("merged-presentation.pptx", Export.SaveFormat.Pptx);
}

// Instantiate a Presentation object that represents a target presentation file
using (Presentation presentation1 = new Presentation("presentation1.pptx"))
{
    // Instantiate a Presentation object that represents a source presentation file
    using (Presentation presentation2 = new Presentation("presentation2.pptx"))
    {
        // Merge first two slides only using slide master
        presentation1.Slides.AddClone(presentation2.Slides[0], presentation1.Masters[0], true);
        presentation1.Slides.AddClone(presentation2.Slides[1], presentation1.Masters[0], true);
    }
    presentation1.Save("merged-presentation-master.pptx", Export.SaveFormat.Pptx);
}