public static int GetNumQuestion()
        {
            int       result = 0;
            string    com    = "select * from Questions";
            DataTable dt     = OLEDBHelper.GetTable(com);

            for (int i = 0; i < dt.Rows.Count; i++)
            {
                result++;
            }
            return(result);
        }
        public static Question GetQuestion()
        {
            Question  q   = null;
            string    com = "select TOP 1 * from Questions ORDER BY Rnd([ID])";
            DataTable dt  = OLEDBHelper.GetTable(com);

            if (dt.Rows.Count > 0)
            {
                DataRow dr = dt.Rows[0];
                q = new Question(Convert.ToInt32(dr["ID"]), dr["Word1"].ToString(), dr["Word2"].ToString(), dr["Word3"].ToString(), dr["Word4"].ToString(), dr["Word5"].ToString(), dr["Answer"].ToString(), dr["Answer2"].ToString());
            }
            return(q);
        }