private static void AddSlideMasterToSlideMasterIdList(PresentationPart presentationPart, SlideMasterPart slideMasterPart)
{
Presentation presentation = presentationPart.Presentation;
SlideMasterIdList slideMasterIdList = presentationPart.Presentation.SlideMasterIdList;
slideMasterIdList.AppendChild(new SlideMasterId()
{
Id = slideMasterIdList.Elements <SlideMasterId>().Select(sm => sm.Id.Value).DefaultIfEmpty(2147483647u).Max() + 1,
RelationshipId = presentationPart.GetIdOfPart(slideMasterPart)
});
presentation.Save(presentationPart);
}
