Merge PowerPoint Presentations using C#

merge-powerpoint-presentation-selected-slides.cs

// 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 only even slides of presentation2 (first slide is at 0 index)
		for (int i = 1; i <= presentation2.Slides.Count; i = i + 2)
		{
			presentation1.Slides.AddClone(presentation2.Slides[i]);
		}
	}
	presentation1.Save("merged-presentation-even.pptx", Export.SaveFormat.Pptx);
}

merge-powerpoint-presentation-slide-master.cs

// 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);
}

merge-powerpoint-presentation.cs

// 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);
}