public Criteria GetCriteria()
        {
            string criteriaString = hdnSearchControlSchema.Value;
            List<Criterion> criterion = (List<Criterion>)(new JavaScriptSerializer().Deserialize(criteriaString, typeof(List<Criterion>)));

            Criteria criteria = new Criteria();
            criteria.Criterias = criterion;

            return criteria;
        }
        public int ToolTipDelayHide { get; set; }  //in seconds

        #endregion

        #region Page Events

        protected override void OnInit(EventArgs e)
        {
            Criteria = new Criteria();
            base.OnInit(e);
        }