//Clone the desired slide to the end of the collection of slides in the same presentation
ISlideCollection slds = pres.getSlides();
//Clone the desired slide to the specified index in the same presentation
slds.insertClone(2, pres.getSlides().get_Item(1));
//Write the modified presentation to disk
pres.save("data/AsposeCloneToPosition.pptx", SaveFormat.Pptx);
}
}