关于c#中语句出现递归报错

Question

using System;
    using System.Collections.Generic;
    using System.Text;    namespace 大学生
    {
        public class gpas
        {            //public int avg;
            public gpas(int a)
            {
                this.avg = a;
            }
            public int avg
            {
                set
                {
                   
                    avg = value;
                   
                }
                get
                {
                    return avg;
                }
            }
                    }
        public class arrylist {
            gpas[] gpa;
            public arrylist(int count)
            {
                gpa = new gpas[count];
            }
            public gpas this[int year]
            {
                get {
                    if(year<=0||year>4){
                        Console.WriteLine("年纪无效");
                        return null;
                    }
                    int index = year - 1;
                    return gpa[index];
                }
                set
                {
                    if (year <= 0 || year > 4)
                    {
                        Console.WriteLine("年纪无效");
                        return ;
                    }
                    int index = year - 1;
                     gpa[index]=value;
                }            }
        }       public class Program
        {
            static void Main(string[] args)
            {
                arrylist alist = new arrylist(4);
                gpas one = new gpas(88);
                gpas two = new gpas( 78);
                gpas three = new gpas( 89);
                gpas four = new gpas( 88);
                alist[0] = one;
                alist[1] = two;
                alist[2] = three;
                alist[3] = four;
                Console.WriteLine("请输入有效的年级");
                int count = int.Parse(Console.ReadLine());
                gpas gp = alist[count];
                Console.WriteLine(gp.avg);
            }
        }
    }
一调试，他就说在avg的读写属性哪报错 好像是递归？请高手指点，本人在线等，急急！！！！

Answer 1

public int avg  属性名改一下，否则就是死循环了

Answer 2

或者把类改成下面的
public class gpas 
{ 
    private int _avg; 
    public gpas(int a) 
    { 
         this._avg= a; 
    } 
    public int avg 
    { 
         set 
         { 
            _avg = value; 
         } 
         get 
         { 
             return _avg; 
         } 
     } 
} 

Answer 3

问题出在那个avg属性上，它没给变量赋值，倒是给自己赋值了。
建议你给属性名称更改一下，同时给变量赋值

Answer 4

using System;
using System.Collections.Generic;
using System.Text;namespace Test
{
    public class People
    {
        private int _intAge;
        public People(int intAge)
        {
            this._intAge = intAge;
        }
        public int Age
        {
            set { _intAge = value; }
            get { return _intAge; }
        }
    }    public class ArrList
    {
        People[] people;
        public ArrList(int count)
        {
            people = new People[count];
        }
        public People this[int year]
        {
            get
            {
                if (year <= 0 && year > 4)
                {
                    Console.WriteLine("年纪无效");
                }
                return people[year>0?year-1:1];
            }
            set
            {
                if (year <= 0 && year > 4)
                {
                    Console.WriteLine("年纪无效");
                }
                people[year > 0 ? year - 1 : 1] = value;
            }
        }
    }
    public class Program
    {
        static void Main(string[] args)
        {
            ArrList list = new ArrList(4);
            People p1 = new People(88);
            People p2 = new People(78);
            People p3 = new People(89);
            People p4 = new People(88);
            list[0] = p1;
            list[1] = p2;
            list[2] = p3;
            list[3] = p4;
            Console.WriteLine("请输入有效的年级");
            People people = list[int.Parse(Console.ReadLine())];
            Console.WriteLine(people.Age);
            Console.ReadKey();
        }
    }
}