List<string>里 每个元素重复了多少次

List<string>里 每个元素重复了多少次

     static void Main(string[] args)
        {
            List<string> list = new List<string>();
            list.Add("aaa");
            list.Add("aa");
            list.Add("dd");
            list.Add("aaa");
            list.Add("dd");
            list.Add("aa");
            list.Add("aaa");
            int a = RepeatTimes(list, "aaa");//某个对象重复有多少次
            //打印出重复多少次
            foreach (var item in list.GroupBy(s => s))
            {
                Console.WriteLine("{0}:{1}次", item.Key, item.Count());
            }

        }
        /// <summary>
        /// 某个元素重复次数
        /// </summary>
        /// <param name="L"></param>
        /// <param name="text"></param>
        /// <returns></returns>
        private static int RepeatTimes(List<string> list, string text)
        {
            int num = 0;
            foreach (string str in list)
                if (str == text)
                    num++;
            return num;
        }