xml 序列化

            using (var stream = new MemoryStream())             {                 using (var writer = new XmlTextWriter(stream, Encoding.GetEncoding("GB2312")))                 {                     writer.Formatting = Formatting.Indented;                     writer.IndentChar = '\t';                     var ns = new XmlSerializerNamespaces();                     ns.Add(string.Empty, string.Empty);                     serializer.Serialize(writer, demo,ns);                 }                 string result= Encoding.GetEncoding("GB2312").GetString(stream.ToArray());                 Console.WriteLine(result);             }