public void ModifyPageSetupInAllSections()
{
//ExStart
//ExId:ModifyPageSetupInAllSections
//ExSummary:Shows how to set paper size for the whole document.
Document doc = new Document(MyDir + "Section.ModifyPageSetupInAllSections.doc");
// It is important to understand that a document can contain many sections and each
// section has its own page setup. In this case we want to modify them all.
foreach (Section section in doc)
section.PageSetup.PaperSize = PaperSize.Letter;
doc.Save(MyDir + @"\Artifacts\Section.ModifyPageSetupInAllSections.doc");
//ExEnd
}