private void button1_Click(object sender, EventArgs e)
        {
            OracleConnection con = new OracleConnection("USER ID=TOSMECUSER;Password=TOSMECUSER;Data Source=Tosmec;");
            DataSet ds = new DataSet();
            OracleDataAdapter da = new OracleDataAdapter("select sub_order_lob from tos_d_suborder where sub_order_id =326407 ", con);
            da.Fill(ds);
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                object blob = dr["sub_order_lob"];
                if (blob != DBNull.Value)
                {
                    if (((byte[])blob).Length > 0)
                    {
                        OrderItemCollection objResult = (OrderItemCollection)TransBlobToObject(blob);
                    }
                }
            }
        }
        public object TransBlobToObject( object blob )
        {
            object serializedObject = null;
            MemoryStream stream = null;
            IFormatter formatter = null;
            if ((byte[])blob != null)
            {
                stream = new MemoryStream();
                formatter = new BinaryFormatter();
                stream.Write((byte[])blob, 0, ((byte[])blob).Length);
                stream.Seek(0, SeekOrigin.Begin);
                serializedObject = formatter.Deserialize(stream);
            }
            return serializedObject;
        }
    }
报unable to find assembly 'cis version 1.0.0.0 publickeyToken = xxxxxx'错误,,请问怎么回事啊