public void TestListCustomers() { MetaManager metaManager = new MetaManager(); Customer[] customers = metaManager.ListCustomers(); System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(Customer[]), new Type[] { typeof(Customer), typeof(Configuration), typeof(ConfigurationType), typeof(Configuration[]) }); string result = "-9"; using (System.IO.StringWriter writer = new System.IO.StringWriter()) { serializer.Serialize(writer, customers); result = writer.ToString(); } Console.WriteLine(result); }