Different parts of the OpenXML-SDK’s DOM has a Save method. Do we need to save the parts while modifying the document, or do we only need to save it once when I are done creating/modifying the document?

Is it enough to call methods corresponding to these:

DocumentFormat.OpenXml.Packaging.PresentationPart.Presentation.Save()
DocumentFormat.OpenXml.Packaging.WorkbookPart.Workbook.Save()

And thereby avoid calling methods like these:

DocumentFormat.OpenXml.Spreadsheet.Worksheet.Save()
DocumentFormat.OpenXml.Presentation.Slide.Save()

The reason I ask, is because the samples I’ve seen call Save on both the sheets and slides in addition to the workbook and presentation.