public static SlidePart CloneSlide(this SlidePart templatePart)
{
// find the presentationPart: makes the API more fluent
var presentationPart = templatePart.GetParentParts()
.OfType <PresentationPart>()
.Single();
// clone slide contents
Slide currentSlide = (Slide)templatePart.Slide.CloneNode(true);
var slidePartClone = presentationPart.AddNewPart <SlidePart>();
currentSlide.Save(slidePartClone);
// copy layout part
slidePartClone.AddPart(templatePart.SlideLayoutPart);
return(slidePartClone);
}