在foreach/for中构建where子句的延迟查询

using System;
using System.Collections.Generic;
using System.Data.Entity;

class Program
{
    static void Main(string[] args)
    {
        List<Person> people = new List<Person>
        {
            new Person { Name = "John", Age = 30 },
            new Person { Name = "Jane", Age = 25 },
            new Person { Name = "Jim", Age = 35 },
        };

        // 构建 where 子句，筛选年龄大于等于 30 的行
        var filteredPeople = people.Where(p => p.Age >= 30).ToList();

        // 使用 foreach 循环遍历筛选后的行
        foreach (var person in filteredPeople)
        {
            Console.WriteLine(person.Name);
        }
    }
}

class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}