binary serialize object c

here's sample of the object that could be serialized into string (binary not xml! ) and can be deserialized back.

it useful for creation protocols layer classes and here is example of
binary serializer .

 
using System.Runtime.InteropServices;
using System.Text;
using CCLib.CCEngine.COMDATA;

namespace CCLib.CCEngine
{


    namespace COMDATA
    {
        public class CApprovalCode
        {
            #region "Internal structures"

            private SApprovalCode struc;

            [StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Ansi)]
            public struct SApprovalCode
            {
                [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
                public char[] ApprovalCode;
                [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
                public char[] RetrievalRefNumber;
            }

            public const int struc_size = 18;

            #endregion

            #region "Properties"

            public string ApprovalCode
            {
                set { struc.ApprovalCode = BinFormatter.Set(value, 6); }
                get { return new string(struc.ApprovalCode); }
            }

            public string RetrievalRefNumber
            {
                set { struc.RetrievalRefNumber = BinFormatter.Set(value, 12); }
                get { return new string(struc.RetrievalRefNumber); }
            }

            #endregion

            #region "Methods"

            public CApprovalCode()
            {
                struc = new SApprovalCode();
                struc.ApprovalCode = BinFormatter.Set("", 6);
                struc.RetrievalRefNumber = BinFormatter.Set("", 12);
            }

            /// <summary>
            ///   Method for serializing structure into string 
            /// </summary>
            public string ToString()
            {
                StringBuilder sb = new StringBuilder();
                sb.Append(BinFormatter.RawSerializeStr(struc));

                return sb.ToString();
            }


            /// <summary>
            ///   Method for de-serializing structure  
            /// </summary>
            public void Parse(string s)
            {
                if (s != null && s != "")
                {
                    struc = (SApprovalCode)BinFormatter.RawDeserializeStr(s.Substring(0, struc_size), struc.GetType());
                }
            }

            #endregion
        } //end CApprovalCode
    }
}