libsbmlcs.ModelHistory.addModifiedDate C# (CSharp) Method

        public int addModifiedDate(Date date)
        {
            int ret = libsbmlPINVOKE.ModelHistory_addModifiedDate(swigCPtr, Date.getCPtr(date));
            return ret;
        }

 public void test_RDFAnnotation2_modelWithHistoryWithCharacterReference()
 {
     ModelHistory h = new ModelHistory();
       ModelCreator c = new ModelCreator();
       c.setFamilyName("Dräger");
       c.setGivenName("Andreas");
       h.addCreator(c);
       Date d = new Date(2005,2,2,14,56,11);
       h.setCreatedDate(d);
       h.addModifiedDate(d);
       m2.unsetModelHistory();
       m2.setModelHistory(h);
       XMLNode ann = RDFAnnotationParser.parseModelHistory(m2);
       string expected = "<annotation>\n" +
     "  <rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" xmlns:vCard=\"http://www.w3.org/2001/vcard-rdf/3.0#\" xmlns:bqbiol=\"http://biomodels.net/biology-qualifiers/\" xmlns:bqmodel=\"http://biomodels.net/model-qualifiers/\">\n" +
     "    <rdf:Description rdf:about=\"#_000001\">\n" +
     "      <dc:creator rdf:parseType=\"Resource\">\n" +
     "        <rdf:Bag>\n" +
     "          <rdf:li rdf:parseType=\"Resource\">\n" +
     "            <vCard:N rdf:parseType=\"Resource\">\n" +
     "              <vCard:Family>Dr&#228;ger</vCard:Family>\n" +
     "              <vCard:Given>Andreas</vCard:Given>\n" +
     "            </vCard:N>\n" +
     "          </rdf:li>\n" +
     "        </rdf:Bag>\n" +
     "      </dc:creator>\n" +
     "      <dcterms:created rdf:parseType=\"Resource\">\n" +
     "        <dcterms:W3CDTF>2005-02-02T14:56:11Z</dcterms:W3CDTF>\n" +
     "      </dcterms:created>\n" +
     "      <dcterms:modified rdf:parseType=\"Resource\">\n" +
     "        <dcterms:W3CDTF>2005-02-02T14:56:11Z</dcterms:W3CDTF>\n" +
     "      </dcterms:modified>\n" +
     "    </rdf:Description>\n" +
     "  </rdf:RDF>\n" +
     "</annotation>";
       assertEquals( true, equals(expected,ann.toXMLString()) );
 }