C#如何仅对工龄为3年的Teacher按salary降序排序且其余元素保持原位

• 第一步：筛选出原集合中所有year == 3的Teacher对象，按salary降序排序后存入临时队列，保证按顺序取用排序后的结果
• 第二步：遍历原集合的每个索引位置，若当前位置的教师工作年限不为3则直接保留；若为3则取出临时队列的队首元素填充到当前位置，即可保证非目标对象的位置完全不变，仅调整工作年限为3的教师顺序

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

class Teacher
{
    public int id { get; set; }
    public string name { get; set; }
    public int year { get; set; }
    public double salary { get; set; }

    public Teacher()
    {
    }

    public Teacher(int id, string name, int year, double salary)
    {
        this.id = id;
        this.name = name;
        this.year = year;
        this.salary = salary;
    }
}

class Program
{
    static void Main(string[] args)
    {
        List<Teacher> teachers = new List<Teacher>();
        teachers.Add(new Teacher(1, "Teacher A", 4, 2000));
        teachers.Add(new Teacher(2, "Teacher B", 3, 3000));
        teachers.Add(new Teacher(3, "Teacher C", 5, 5000));
        teachers.Add(new Teacher(4, "Teacher D", 3, 4000));
        teachers.Add(new Teacher(5, "Teacher E", 3, 7000));

        // 筛选year=3的教师按salary降序排序，转为队列方便按顺序取
        var sortedYear3 = new Queue<Teacher>(teachers.Where(t => t.year == 3).OrderByDescending(t => t.salary));

        // 遍历原集合替换year=3的位置
        for (int i = 0; i < teachers.Count; i++)
        {
            if (teachers[i].year == 3)
            {
                teachers[i] = sortedYear3.Dequeue();
            }
        }

        // 输出验证
        foreach (var t in teachers)
        {
            Console.WriteLine($"{t.id}, {t.name}, {t.year}, {t.salary}");
        }
    }
}

1, Teacher A, 4, 2000
5, Teacher E, 3, 7000
3, Teacher C, 5, 5000
4, Teacher D, 3, 4000
2, Teacher B, 3, 3000

内容的提问来源于stack exchange，提问作者Đức Long