LINQ如何在using语句中延迟执行

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

class Program
{
    static void Main(string[] args)
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };

        using (IEnumerator<int> enumerator = numbers.GetEnumerator())
        {
            while (enumerator.MoveNext())
            {
                int currentNumber = enumerator.Current;
                var evenNumbers = numbers.Where(x => x % 2 == 0);
                Console.WriteLine($"Even numbers less than {currentNumber}: {string.Join(", ", evenNumbers)}");
            }
        }
    }
}