C# - XmlSerialize from class and remove default namespaces

XmlSerializerFromClass.cs

XmlSerializer serializer = new XmlSerializer(typeof(MetadataFile));
MemoryStream memoryStream = new MemoryStream();

//Configuration remove tag omit-xml-declaration
XmlWriterSettings settings = new XmlWriterSettings();
settings.OmitXmlDeclaration = true;
XmlWriter writer = XmlWriter.Create(memoryStream, settings);

//Remove namespace
StringWriter stringWriter = new StringWriter();
XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces();
namespaces.Add(string.Empty, string.Empty);

//Serializer to Byte Array
serializer.Serialize(writer, metadataFile, namespaces);
var fileXML = memoryStream.ToArray();