LINQ如何跨多个列表返回公共对象

// 定义一个公共对象类
public class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
}

// 创建两个列表
List<Person> list1 = new List<Person>
{
    new Person { Id = 1, Name = "Alice" },
    new Person { Id = 2, Name = "Bob" },
    new Person { Id = 3, Name = "Charlie" }
};

List<Person> list2 = new List<Person>
{
    new Person { Id = 2, Name = "Bob" },
    new Person { Id = 3, Name = "Charlie" },
    new Person { Id = 4, Name = "David" }
};

// 使用Join操作符进行关联查询
var commonPersons = from p1 in list1
                    join p2 in list2 on p1.Id equals p2.Id
                    select p1;

// 输出结果
foreach (var person in commonPersons)
{
    Console.WriteLine($"Id: {person.Id}, Name: {person.Name}");
}