在C#表达式中使用查询对象返回不同的类型

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

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

public class Program
{
    public static void Main()
    {
        List<Person> people = new List<Person>
        {
            new Person { Name = "Alice", Age = 25 },
            new Person { Name = "Bob", Age = 30 },
            new Person { Name = "Charlie", Age = 35 }
        };

        // 查询年龄大于30的人的姓名
        var names = from person in people
                    where person.Age > 30
                    select person.Name;

        foreach (var name in names)
        {
            Console.WriteLine(name);
        }
    }
}