LINQ在选择匿名类型时包含嵌套属性

var students = new List<Student>
{
    new Student { Id = 1, Name = "Alice", Grade = "A", Address = new Address { City = "New York", Country = "USA" } },
    new Student { Id = 2, Name = "Bob", Grade = "B", Address = new Address { City = "London", Country = "UK" } },
    new Student { Id = 3, Name = "Charlie", Grade = "A", Address = new Address { City = "Paris", Country = "France" } }
};

var query = from student in students
            select new
            {
                student.Name,
                student.Grade,
                student.Address.City,
                student.Address.Country
            };

foreach (var result in query)
{
    Console.WriteLine($"Name: {result.Name}, Grade: {result.Grade}, City: {result.City}, Country: {result.Country}");
}