可使用以下代码：//Create our own namespaces for the outputXmlSerializerNamespaces ns = new XmlSerializerNamespaces (); //Add an empty namespace and empty valuens.Add ("", ""); //Create the serializerXmlSerializer slz = new XmlSerializer (someType); //Serialize the object with our own namespaces (notice the overload)slz.Serialize (myXmlTextWriter, someObject, ns);此外，在评论中还提到了去除开头的<?xml version="1.0" encoding="utf-8"?>的方法：XmlWriterSettings settings = new XmlWriterSettings (); // Remove the <?xml version="1.0" encoding="utf-8"?>settings.OmitXmlDeclaration = true; XmlWriter writer = XmlWriter.Create ("output_file_name.xml", settings); 另外，如果出现开头没有encoding="utf-8"时，应该使用： XmlWriterSettings settings = new XmlWriterSettings ();settings.Encoding = Encoding.UTF8; XmlWriter writer = XmlWriter.Create ("output_file_name.xml", settings);