public void TestGetRelatedPartById() { using (Stream s = new FileStream(TESTFILE_DIR + "test002.docx", FileMode.Open)) { OPCPackage package = new OPCPackage(s); RelatedPartProvider rpp = new RelatedPartProvider(package, package.RootPart); PartInfo relatedPart = rpp.GetRelationPart("rId1"); Assert.AreEqual("word/document.xml", relatedPart.Target); relatedPart = rpp.GetRelationPart("rId2"); Assert.AreEqual("docProps/core.xml", relatedPart.Target); } }