如何制作列表的可枚举范围列表？

Question

I can make a List of chars like this:

List<char> letter = Enumerable.Range(0, 10)
                              .Select(i => '\0')
                              .ToList();

And a List of int? like this:

List<int?> number = Enumerable.Range(0, 10)
                              .Select(i => (int?)i)
                              .ToList();

And call them by letter[1] = 'a' and number[1] = 5 .

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How can I make a List (or HashSet ) of 10 List<char> 's?

Something like:

List<char> myList = Enumerable.Range(0, 10)
                              .Select(i => List<char> i)
                              .ToList();

myList[1] , myList[2] , myList[3]

---

I want to loop through and add items to each list.

for (int i = 0; i < 10; i++)
{
    myList[i].Add(letter[i]);
}

Answer 1

You can combine your two approaches as follows:

List<List<char>> myList = Enumerable.Range(0, 10)
     .Select(i => Enumerable.Range(0, 10).Select(c => '\0').ToList())
     .ToList();