c# 判斷兩個集合是否有交集

/// <summary>
        /// 判斷是否有交集
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list1"></param>
        /// <param name="list2"></param>
        /// <returns></returns>
        public static bool IsArrayIntersection<T>(List<T> list1, List<T> list2)
        {
            List<T> t = list1.Distinct().ToList();

            var exceptArr = t.Except(list2).ToList();

            if (exceptArr.Count < t.Count)
            {
                return true;
            }
            else
            {
                return false;
            }

        }