.NET如何检查list<int>是否按数字顺序(1-9)？

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
    public static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

        bool isSorted = IsListSorted(numbers);

        Console.WriteLine("Is the list sorted? " + isSorted);
    }

    public static bool IsListSorted(List<int> list)
    {
        if (list == null || list.Count == 0)
        {
            return true; // An empty or null list is considered sorted
        }

        for (int i = 1; i < list.Count; i++)
        {
            if (list[i] < list[i - 1])
            {
                return false; // If any element is less than the previous one, it's not sorted
            }
        }

        return true; // If no elements are out of order, the list is sorted
    }
}

public static bool IsListSortedUsingLINQ(List<int> list)
{
    if (list == null || list.Count == 0)
    {
        return true;
    }

    return list.SequenceEqual(Enumerable.Range(list.Min(), list.Count));
}