使用Linq将包含原语数据的对象列表分组到新的分组对象列表中

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

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

public class GroupedPerson
{
    public int AgeGroup { get; set; }
    public List<Person> People { 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 = 25 },
            new Person { Name = "David", Age = 30 }
        };

        var groupedPeople = people
            .GroupBy(p => p.Age / 10 * 10) // 按年龄分组，每组10年
            .Select(g => new GroupedPerson
            {
                AgeGroup = g.Key,
                People = g.ToList()
            })
            .ToList();

        foreach (var group in groupedPeople)
        {
            Console.WriteLine($"Age Group: {group.AgeGroup}");
            foreach (var person in group.People)
            {
                Console.WriteLine($"  {person.Name}, {person.Age}");
            }
        }
    }
}