XML object serializer in C#

            string path = @"c:\a\ERepositoryDebug_" + DateTime.Now.ToString("dd-MM-yyyy__hh.mm.ss") + ".xml";
            System.Xml.Serialization.XmlSerializer writer =
                new System.Xml.Serialization.XmlSerializer(typeof(FileNewMetadata));
            System.IO.FileStream file = System.IO.File.Create(path);
            writer.Serialize(file, metadata);
            file.Close();