SIPSorcery.SIP.SIPEventPresence.SIPPresenceUnitTest.InvalidXMLUnitTest C# (CSharp) Method

            public void InvalidXMLUnitTest()
            {
                Console.WriteLine("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);

                if (m_presenceSchema == null)
                {
                    Console.WriteLine("Loading XSD schema for dialog event package, takes a while...");

                    m_presenceSchema = new XmlSchemaSet();
                    XmlReader schemaReader = new XmlTextReader(SIPSorcery.SIP.Properties.Resources.PIDFSchema, XmlNodeType.Document, null);
                    m_presenceSchema.Add(m_pidfXMLNS, schemaReader);
                }

                // The mandatory entity attribue on the presence element is missing.
                string invalidPresenceXMLStr =
                     "<?xml version='1.0' encoding='utf-16'?>" +
                     "<presence xmlns='urn:ietf:params:xml:ns:pidf'>" +
                     "</presence>";

                XDocument presenceDoc = XDocument.Parse(invalidPresenceXMLStr);
                presenceDoc.Validate(m_presenceSchema, (o, e) =>
                {
                    Console.WriteLine("XSD validation " + e.Severity + " event: " + e.Message);

                    if (e.Severity == XmlSeverityType.Error)
                    {
                        throw e.Exception;
                    }
                });

                Console.WriteLine("-----------------------------------------");
            }