public void OpenReadOnlyAccessFeature()
{
	// Open a WordprocessingDocument based on a filepath.
	using (WordprocessingDocument wordDocument = WordprocessingDocument.Open(MyDir + "Open readonly access.docx", false))
	{
		// Assign a reference to the existing document body.  
		Body body = wordDocument.MainDocumentPart.Document.Body;
		// Attempt to add some text.
		Paragraph para = body.AppendChild(new Paragraph());
		Run run = para.AppendChild(new Run());
		run.AppendChild(new Text("Append text in body, but text is not saved - Open wordprocessing document readonly"));
		// Call the "Save" method to generate an exception and show that access is read-only.
		using (Stream stream = File.Create(ArtifactsDir + "Open readonly access - OpenXML.docx"))
		{
			wordDocument.MainDocumentPart.Document.Save(stream);
		}
	}
}