XML Serialize without namespace and xml declaration

XMLSerialize.cs

ObjectToSerialize objectToSerialize = new ObjectToSerialize();
StringBuilder sb = new StringBuilder();
XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
ns.Add("", ""); 
XmlWriterSettings settings = new XmlWriterSettings();
settings.OmitXmlDeclaration = true;
XmlWriter xmlWriter = XmlWriter.Create(new StringWriter(sb), settings);
xmlSerializer.Serialize(xmlWriter, objectToSerialize, ns);
Console.WriteLine(sb.ToString());