C# 定义一个描述学生基本信息的类，属性包括姓名、学以及C#、英语和数学成绩，方法包括设置姓名和学号、设置三门课的成绩和输出相关学生的信息，最后求出总成绩和平均成绩。

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代码如下：

	using System;
	
	namespace debug_code5._9
	{
	    public class Student
	    {
	        public string Name { get; set; }//自动属性
	        public string StudentID { get; set; }
	        public string CSharpScore { get; set; }
	        public string EnglishScore { get; set; }
	        public string MathScore { get; set; }
	        public int ScoreSum;
	        public int ArrScore;
	        public Student(string n, string i, string c, string m, string j)
	        {
	            Name = n;
	            StudentID = i;
	            CSharpScore = c;
	            EnglishScore = m;
	            MathScore = j;
	            ScoreSum = int.Parse(c) +int.Parse(m) + int.Parse(j);
	            ArrScore = ScoreSum / 3;
	             
	        }
	
	
	        public void Output_Major()
	        {
	            Console.WriteLine("Student:{0}'s StudentID is {1} CSharpScore is {2} EnglishScore is {3} MathScore is {4}", Name, StudentID, CSharpScore, EnglishScore, MathScore);
	            Console.WriteLine("Student:{0}'s SunScore is {1}",Name,ScoreSum);
	            Console.WriteLine("Student:{0}'s ArrScore is {1}", Name,ArrScore);
	        }
	    }
	    class Program
	    {
	        static void Main(string[] args)
	        {
	            string n, i, c, m, j;
	            Console.Write("请依次输入以下内容：\n \t姓名\n \t学号\n \tC#成绩\n \t英语成绩\n \t数学成绩\n");
	            n = Console.ReadLine();
	            i = Console.ReadLine();
	            c = Console.ReadLine();
	            m = Console.ReadLine();
	            j = Console.ReadLine();
	            Student s1 = new Student(n, i, c, m, j);
	            s1.Output_Major();
	            Console.Read();
	        }
	
	    }
	}