通过LINQ中的子属性对父对象进行排序

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

class Parent
{
    public string Name { get; set; }
    public Child Child { get; set; }
}

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

class Program
{
    static void Main(string[] args)
    {
        List<Parent> parents = new List<Parent>
        {
            new Parent { Name = "Parent 1", Child = new Child { Name = "Child 1", Age = 10 } },
            new Parent { Name = "Parent 2", Child = new Child { Name = "Child 2", Age = 5 } },
            new Parent { Name = "Parent 3", Child = new Child { Name = "Child 3", Age = 8 } }
        };

        var sortedParents = parents.OrderBy(p => p.Child.Age);

        foreach (var parent in sortedParents)
        {
            Console.WriteLine($"{parent.Name} - {parent.Child.Name} - {parent.Child.Age}");
        }
    }
}