如何在GroupedEnumerable上设置OrderBy

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 = 30 },
            new Person { Name = "Bob", Age = 25 },
            new Person { Name = "Charlie", Age = 35 },
            new Person { Name = "David", Age = 25 },
            new Person { Name = "Eve", Age = 30 }
        };

        var groupedByAge = people.GroupBy(p => p.Age);

        // 按年龄分组后，按年龄排序
        var sortedGroupedByAge = groupedByAge.OrderBy(g => g.Key);

        foreach (var group in sortedGroupedByAge)
        {
            Console.WriteLine($"Age: {group.Key}");
            foreach (var person in group)
            {
                Console.WriteLine($"  {person.Name}, {person.Age}");
            }
        }
    }
}