c# linq对象选择列表查看另一个对象列表

// 定义一个Person类
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

// 定义一个City类
public class City
{
    public string Name { get; set; }
    public string Country { get; set; }
}

// 创建Person列表
List<Person> persons = new List<Person>
{
    new Person { Name = "John", Age = 25 },
    new Person { Name = "Alice", Age = 30 },
    new Person { Name = "Bob", Age = 35 }
};

// 创建City列表
List<City> cities = new List<City>
{
    new City { Name = "New York", Country = "USA" },
    new City { Name = "London", Country = "UK" },
    new City { Name = "Tokyo", Country = "Japan" }
};

// 使用LINQ查询选择Person列表中的Name属性，并查看对应的City列表中的Country属性
var result = from person in persons
             join city in cities on person.Name equals city.Name
             select new { PersonName = person.Name, Country = city.Country };

// 遍历结果并输出
foreach (var item in result)
{
    Console.WriteLine($"Person: {item.PersonName}, Country: {item.Country}");
}

Person: John, Country: USA
Person: Alice, Country: UK
Person: Bob, Country: Japan