c#簡單的學生成績排序

code//TestStudent.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestStudent
{
public class Student : IComparable
{
private string name;
private float score;
public Student()
{
}
public Student(string name, float score)
{
this.name = name;
this.score = score;
}
public string Name
{
set
{
this.name = value;
}
get
{
return this.name;
}
}

public float Score
{
set
{
this.score = value;
}
get
{
return this.score;
}
}
public int CompareTo(object obj)
{
return (int)(this.score - ((Student)obj).score);
}

}
}

//main.cs
using System;
using System.Collections;
using System.Linq;
using System.Text;

namespace TestStudent
{
class Program
{
static void Main(string[] args)
{
ArrayList arr = new ArrayList();
string line = Console.ReadLine();
while (line != "Exit" && line != "Sort" )
{
string[] infos = line.Split(new char[] { ' ' });
Student s = new Student(infos[0], float.Parse(infos[1]));
arr.Add(s);
line = Console.ReadLine();
}
if (line == "Sort")
{
arr.Sort();
for (int i = 0; i < arr.Count; i++)
{
Console.WriteLine(((Student)arr[i]).Name + " : " + ((Student)arr[i]).Score.ToString());
}
}
Console.ReadKey();
}
}
}