如何使用Linq

Question

我有一个有序的数字数组{1,2,3,4,5,9,10,11,13}。 需要将它们分组为：{1,2,3,4,5}，{9,10,11}，{13}。 我使用for循环来解决这个问题：

// An ordered array
        int[] numbers = {1, 2, 3, 4, 5, 9, 10, 11, 13};
        List<List<int>> listOfGroupNum = new List<List<int>>();
        List<int> listofNumbers = new List<int>();
        for (int i = 0; i < numbers.Length; i++)
        {
            // Take two numbers
            // If a difference betwen them -1 adding to a group
            if (((i + 1) < numbers.Length) && (numbers[i] - numbers[i + 1] == -1))
            {
                listofNumbers.Add(numbers[i]);
                continue;
            }
            listofNumbers.Add(numbers[i]);
            listOfGroupNum.Add(listofNumbers);
            listofNumbers = new List<int>();
        }

有没有办法使用Linq解决这个问题？

更新 我找到了一个LINQ表达式，回答我的问题：

        int[] numbers = {1, 2, 3, 4, 5, 9, 10, 11, 13};
        var groups =
            numbers.Select((x, i) => new {Difference = i - x, Value = x})
                .GroupBy(x => x.Difference)
                .Select(x => x.Select(y => y.Value).ToList()).ToList();