Object to Xml not serializing byte[] data

hi to all.
I am serializing my object / converting it to XML data
and passing to another page and again Deserializing it.

i am using following function to serialize and Deserializing

public static string Serialize(object objectToSerialize)
     {
         MemoryStream mem = new MemoryStream();
         XmlSerializer ser = new XmlSerializer(objectToSerialize.GetType());
         ser.Serialize(mem, objectToSerialize);
         ASCIIEncoding ascii = new ASCIIEncoding();
         return ascii.GetString(mem.ToArray());
     }

     public static object Deserialize(string xmlString)
     {
         Type typeToDeserialize;
         byte[] bytes = Encoding.UTF8.GetBytes(xmlString);
         typeToDeserialize =xmlString.GetType();
         MemoryStream mem = new MemoryStream(bytes);
         XmlSerializer ser = new XmlSerializer(typeof (User ));
         return ser.Deserialize(mem);
     }

i have object User as

public class User
   {
       public string UserId { get; set; }
       public string Depatment { get; set; }
       public string Role { get; set; }
       internal byte[] FPTemplates { get; set; }
   }

now when i am serializing it i m getting only first three elements
FPTemplates which is byte[] it is not present in xml file
what should i do to get full serialization of object.??

plz help me...
thank in advance...:)
god bless u all.. :)

Tags: C#, XML, Serialization