System.Xml.Tests.TCFullEndElement.TCWriteString.writeString_15 C# (CSharp) Method

            public int writeString_15()
            {
                char[] invalidXML = { '\uDF20', 'b', 'c' };
                string invXML = new String(invalidXML);

                using (XmlWriter w = CreateWriter())
                {
                    try
                    {
                        w.WriteStartElement("Root");
                        w.WriteString(invXML);
                    }
                    catch (ArgumentException e)
                    {
                        CError.WriteLineIgnore("Exception: " + e.ToString());
                        CheckErrorState(w.WriteState);
                        return TEST_PASS;
                    }
                }
                CError.WriteLine("Did not throw exception");
                return TEST_FAIL;
            }