XML Serialize/DeSerialize

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;

namespace ConsoleApplication3
{

    public static class XmlExtension
    {
        public static T DeSerialize<T>(this T value, Byte[] bytes)
        {
            if (value == null)
                return default(T);

            var xmlserializer = new XmlSerializer(typeof(T));
            var xmlSerializerNamespaces = new XmlSerializerNamespaces();
            xmlSerializerNamespaces.Add(string.Empty, string.Empty);


            using (var reader = new MemoryStream(bytes))
            {
                value = (T)xmlserializer.Deserialize(reader);
            }

            return value;
        }

        public static string Serialize<T>(this T value)
        {
            if (value == null)
                return string.Empty;

            var xmlserializer = new XmlSerializer(typeof(T));
            var xmlSerializerNamespaces = new XmlSerializerNamespaces();
            xmlSerializerNamespaces.Add(string.Empty, string.Empty);

            using (var stringWriter = new StringWriter())
            {
                using (var writer = XmlWriter.Create(stringWriter, new XmlWriterSettings { Indent = true, OmitXmlDeclaration = true, Encoding = Encoding.UTF8 }))
                {
                    xmlserializer.Serialize(writer, value, xmlSerializerNamespaces);
                    return stringWriter.ToString();
                }
            }
        }
    }
}