RijndaelManagedExtensions -TizzyT

using System.IO;
using System.Text;
using System.Xml.Serialization;

namespace System.Security.Cryptography
{
    public static class RijndaelManagedExtensions
    {
        // Structure to store required Rijndael parameters
        public struct RijndaelParameters
        {
            public byte[] IV;
            public byte[] KEY;

            public RijndaelParameters(byte[] IV, byte[] KEY)
            {
                this.IV = IV;
                this.KEY = KEY;
            }
        }

        // Extract Rijndael Parameters as byte[]
        public static byte[] GetParamBytes(this RijndaelManaged rijndael)
        {
            var sw = new StringWriter();
            new XmlSerializer(typeof(RijndaelParameters)).Serialize(sw, new RijndaelParameters(rijndael.IV, rijndael.Key));
            return Encoding.UTF8.GetBytes(sw.ToString());
        }

        // Construct a new RijndaelManaged via ParamBytes (obtained from GetParamBytes)
        public static RijndaelManaged ConstructRijndaelManaged(this byte[] ParamBytes)
        {
            RijndaelParameters Params = (RijndaelParameters)new XmlSerializer(typeof(RijndaelParameters)).Deserialize(new StringReader(Encoding.UTF8.GetString(ParamBytes)));
            return new RijndaelManaged
            {
                IV = Params.IV,
                Key = Params.KEY
            };
        }
    }
}