public void SectionsAddSection()
{
//ExStart
//ExFor:NodeCollection.Add
//ExId:SectionsAddSection
//ExSummary:Shows how to add a section to the end of the document.
Document doc = new Document(MyDir + "Document.doc");
Section sectionToAdd = new Section(doc);
doc.Sections.Add(sectionToAdd);
//ExEnd
}