刚学C#，看不懂题目，不会写，有哪位大佬可以帮帮忙？（定义员工类及公司类并实现其功能）

某公司员工拥有若干个职员，职员信息有（工号、姓名、性别、出生年月、职称、籍贯、爱好）

1.请设计如下的类

（1）社员（Staff）：需要包含上述属性信息；本身支持按照员工工号排序；属性【爱好】要求是不重复的集合结构。

（2）公司（Company）：需要包含所有的社员信息；需要支持根据工号和名字查找员工信息的方法。

2.请实现以下功能

（1）创建公司实例，并且添加10个以上的员工信息。

（2）请分别按照工号、姓名、性别、出生年月来排序员工信息，并输出。

（3）输入一个爱好，并判断本公司内是否有这个爱好的员工；若有则输出有这个爱好的员工信息。

（4）先获取公司人员的所有籍贯信息，然后按ji'gua归类

希望你能看得懂。。。。控制台应用程序

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Company
{
    class Program
    {
        static void Main(string[] args)
        {
            var Name1 = new[] { "张", "李","王" };
            var Name2 = new[] { "三", "四","六" };
            var sex = new[] { "男","女"};
            var Hobbies = new[] { "篮球", "足球", "看电影", "唱歌" };
            var BirthPlace = new[] { "桂林","南宁","柳州","贺州"};
            var rnd = new Random();
            int count = rnd.Next(10, 20);

            var cmp = new Company() { staffs=new List<Staff>()};
      
            for (var i = 0; i < count; i++)
            {
                cmp.staffs.Add(new Staff
                {
                    No = (i + 1).ToString(),
                    Name = Name1[rnd.Next(0, Name1.Length)] + Name2[rnd.Next(0, Name2.Length)] + i,
                    Sex = sex[rnd.Next(0, sex.Length)],
                    Birthdate = DateTime.Now.AddMonths(-rnd.Next(100, 200)),
                    JobTitle = "员工",
                    BirthPlace = BirthPlace[rnd.Next(0, BirthPlace.Length)],
                    Hobbies = Hobbies.Skip(rnd.Next(0, Hobbies.Length + 1)).ToList()
                });
            }
            var searchFDs = new[] { "工号", "姓名", "爱好" };
            var sortFDs = new[] { "工号", "姓名", "性别", "出生年月" };
            bool isSearch;
            while (true)
            {
                Console.WriteLine("\n\n1.按照籍贯归类并输出人员\n2.查找员工信息\n3.员工排序输出\n0.退出系统\n\n");
                Console.Write("请输入指令：");
                var k = Console.ReadLine();
                switch (k)
                {
                    case "0": return;
                    case "1":cmp.showStaffOrderByBirthPlace(); break;
                    case "2":
                    case "3":
                        isSearch = k == "2";
                        while (true)
                        {
                            Console.Write("输入要查询的字段名称，如"+(isSearch? "工号/姓名/爱好": "工号/姓名/性别/出生年月") + "：");
                            k = Console.ReadLine();
                            if ((isSearch && searchFDs.Contains(k)) || (!isSearch && sortFDs.Contains(k)))
                            {
                                if (isSearch)
                                {
                                    Console.Write("请输入字段值：");
                                    var value = Console.ReadLine();
                                    cmp.FindStaffByField(k, value);
                                }
                                else
                                {
                                    cmp.ShowStaffOrderBy(k);
                                }
                                break;
                            }
                            else Console.WriteLine("字段名称输入错误");
                        }
                        break;
                    default: Console.WriteLine("指令错误"); break;
                }
            }
        }
    }

    public class Staff
    {
        public string No { get; set; }
        public string Name { get; set; }
        public string Sex { get; set; }
        public DateTime Birthdate { get; set; }
        public string JobTitle { get; set; }
        public string BirthPlace { get; set; }
        public List<string> Hobbies { get; set; }
        public override string ToString()
        {
            return string.Format("{0,-5}{1,-10}{2,-5}{3,-15}{4,-5}{5,-10}\t{6}", No, Name, Sex, Birthdate.ToString("yyyy-MM-dd"), JobTitle, BirthPlace, String.Join("，", Hobbies));
        }
    }
    public class Company
    {
        public List<Staff> staffs { get; set; }

        public void FindStaffByField(string fd,string value)
        {
            var rs = staffs.Where(i => fd == "姓名" ? i.Name.Contains(value) : fd == "工号" ? i.No == value : i.Hobbies.Contains(value));
            if (rs.Count() == 0) Console.WriteLine("找不到" + fd + "为" + value + "的员工记录！");
            else foreach (var r in rs) Console.WriteLine(r);
        }
        public void ShowStaffOrderBy(string fd )
        {
            IEnumerable<Staff> rs;
            switch (fd)
            {
                case "姓名": rs = staffs.OrderBy(i => i.Name); break;
                case "性别": rs = staffs.OrderBy(i => i.Sex); break;
                case "出生年月": rs = staffs.OrderBy(i => i.Birthdate); break;
                default: rs = staffs.OrderBy(i => i.No); break;
            }
            Console.WriteLine("按照“"+ fd + "”排序");
            foreach (var r in rs) Console.WriteLine(r);
        }

        public void showStaffOrderByBirthPlace()
        {
            var bpg = staffs.GroupBy(i => i.BirthPlace);
            foreach (var b in bpg) {
                Console.WriteLine(b.Key);
                foreach (var s in b) Console.WriteLine(s);
            }
        }
    }
}