如何使两个数组中的元素符合条件，Linq c#

using System.Linq;

int[] array1 = { 1, 2, 3, 4, 5 };
int[] array2 = { 4, 5, 6, 7, 8 };

var result = array1.Join(
    array2,
    a => a,
    b => b,
    (a, b) => new { Array1Element = a, Array2Element = b }
);

foreach (var item in result)
{
    Console.WriteLine($"Array1Element: {item.Array1Element}, Array2Element: {item.Array2Element}");
}

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] array1 = { 1, 2, 3, 4, 5 };
        int[] array2 = { 4, 5, 6, 7, 8 };

        var result = array1.Join(
            array2,
            a => a,
            b => b,
            (a, b) => new { Array1Element = a, Array2Element = b }
        );

        foreach (var item in result)
        {
            Console.WriteLine($"Array1Element: {item.Array1Element}, Array2Element: {item.Array2Element}");
        }
    }
}