System.Xml.Tests.TCDocType.docType_3 C# (CSharp) Method

        public int docType_3()
        {
            using (XmlWriter w = CreateWriter())
            {
                try
                {
                    w.WriteDocType("doc1", null, null, "<!ENTITY e 'abc'>");
                    w.WriteDocType("doc2", null, null, "<!ENTITY f 'abc'>");
                }
                catch (InvalidOperationException e)
                {
                    CError.WriteLineIgnore(e.ToString());
                    CError.Compare(w.WriteState, WriteState.Error, "WriteState should be Error");
                    return TEST_PASS;
                }
            }
            CError.WriteLine("Did not throw exception");
            return TEST_FAIL;
        }