集合排序：使用默认比较器Comparable<T>排序对象

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

namespace Demo
{
    class Student:IComparable<Student>
    {

        public Student(int StudentId,string StudentName)
        {
            this.StudentId = StudentId;
            this.StudentName = StudentName;
        }
        public string StudentName { get; set; }
        public int StudentId { get; set; }
        
        //方法：获取学员信息
        public string GetStudent()
        {
            string info = string.Format("姓名：{0} 学号：{1}",StudentName,StudentId);
            
            return info;
        }

        public int CompareTo(Student other)
        {
            return other.StudentId.CompareTo(this.StudentId);
        }
    }
}

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

#region if运用
namespace Demo
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建几个学员变量
            Student objStu1 = new Student(1001,"小王");
            Student objStu2 = new Student(1002,"小张");
            Student objStu3 = new Student(1003,"小李");


            List<Student> stuList = new List<Student>()
            {objStu1,objStu2,objStu3 };

            stuList.Sort();

            foreach (Student stu in stuList)
            {
                Console.WriteLine(stu.StudentId+"\t"+stu.StudentName);
            }

                Console.ReadLine();
        }


    }
}
#endregion

 如果是对象类型元素，当排序只有一种的时候，可使用默认比较器comparable<T>在类中直接实现接口即可。