How deserialize Byte array to object - Windows 8 / WP 8

Hi I use code below to convert object to byte array now I need this byte array convert back to object. Does any one know how to deserialize this in windows 8 app? I find some code but use Serialize and BinaryReader classes and this classes are not in windows 8 or does not know it.

Person ps = new Person();
        ps.name = "Lucy";

        DataContractSerializer serializer = new DataContractSerializer(typeof(List<Dictionary<String, String>>));

        byte[] byteArr;
        using (var ms = new MemoryStream())
        {
            serializer.WriteObject(ms, ps.name);
            byteArr = ms.ToArray();
        }
        tbByteResult.Text = byteArr.ToString();