如何通过Linq C#获取每个数组的第一个元素

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

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

        var firstElements = arrays.Select(arr => arr.First());

        foreach (var element in firstElements)
        {
            Console.WriteLine(element);
        }
    }
}

1
4
7