[Serializable]
    public partial class MyDataSet : DataSet, ISerializable
    {
        public MyDataSet()
        { }
        protected MyDataSet(SerializationInfo info, StreamingContext context)  
        {}
    }
        private void btn反序列化_Click(object sender, EventArgs e)
        {      
            byte[] buffer = null;
            IFormatter formater = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            MemoryStream fs = new MemoryStream();
            DataTable dt=dsSYS_TestM.Tables[0].Copy();
            MyDataSet md = new MyDataSet();
            md.Tables.Add(dt);
            formater.Serialize(ms, md);
            buffer = new byte[(int)ms.Length];
            ms.Position = 0;
            ms.Read(buffer, 0, (int)ms.Length);
            ms.Close();
            IFormatter bina = new BinaryFormatter();
            MemoryStream ms1 = new MemoryStream(buffer);
            MyDataSet d = (MyDataSet)bina.Deserialize(ms1);
            ms1.Close();
        }