如何在规范中生成动态数量的ThenBy子句

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

public class Program
{
    public static void Main()
    {
        // 创建一个示例数据集合
        List<Person> people = new List<Person>
        {
            new Person { Name = "John", Age = 25 },
            new Person { Name = "Alice", Age = 30 },
            new Person { Name = "Bob", Age = 20 },
            new Person { Name = "Alice", Age = 35 }
        };

        // 创建一个初始查询表达式
        var query = people.OrderBy(p => p.Name);

        // 动态添加ThenBy子句
        query = AddThenByClause(query, "Age", SortDirection.Ascending);

        // 执行查询并输出结果
        foreach (var person in query)
        {
            Console.WriteLine($"Name: {person.Name}, Age: {person.Age}");
        }
    }

    // 动态添加ThenBy子句的方法
    public static IOrderedEnumerable<Person> AddThenByClause(IOrderedEnumerable<Person> query, string propertyName, SortDirection direction)
    {
        // 获取属性信息
        var property = typeof(Person).GetProperty(propertyName);

        // 根据排序方向添加ThenBy或ThenByDescending子句
        if (direction == SortDirection.Ascending)
        {
            return query.ThenBy(p => property.GetValue(p));
        }
        else
        {
            return query.ThenByDescending(p => property.GetValue(p));
        }
    }
}

// 示例数据类
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

// 排序方向枚举
public enum SortDirection
{
    Ascending,
    Descending
}