C#中怎样统计数组中一个一维数组中每个元素出现的次数?

      int[] nums = { 1, 9, 3, 5, 4, 1, 1, 9, 7, 9, 4, 7, 1, 3, 2, 2, 8, 9, 6, 8 };
            foreach (var v in nums.GroupBy(x => x).Select(x => new { k = x.Key, c = x.Count() }))
                Console.WriteLine("{0}出现了{1}次", v.k, v.c);
            Console.ReadLine();