/// <summary>    /// Range Helper    /// </summary>    /// <typeparam name="T"></typeparam>    public class RangeHelper<T> where T : IComparable<T>    {        /// <summary>        /// 为val返回指定范围内合法的值        /// </summary>        /// <param name="val"></param>        /// <param name="min"></param>        /// <param name="max"></param>        /// <returns></returns>        public static T ValidateRange(T val, T min, T max)        {            val = val.CompareTo(min) < 0 ? min : val;            val = val.CompareTo(max) > 0 ? max : val;            return val;        }    }

CurrentPage = RangeHelper<int>.ValidateRange(CurrentPage, 1, TotalPage);