System.Xml.Tests.TCErrorState.state_1 C# (CSharp) Method

        public int state_1()
        {
            using (XmlWriter w = CreateWriter())
            {
                try
                {
                    w.WriteStartDocument();
                    w.WriteEntityRef("ent");
                }
                catch (InvalidOperationException e)
                {
                    CError.WriteLineIgnore("Exception: " + e.ToString());
                    CError.Compare(w.WriteState, WriteState.Error, "WriteState should be Error");

                    return TEST_PASS;
                }
            }
            CError.WriteLine("Did not throw exception");
            return TEST_FAIL;
        }