C#析构函数，类运行结束后运行

 public class Students
    {
        //创建对像时使用
        public Students(string name, int age, char gender, int englist, int chinese, int math)
        {
            this.Name = name;
            this.Age = age;
            this.Gender = gender;
            this.Englist = englist;
            this.Chinese = chinese;
            this.Math = Math;
        }
        public Students(string name, int age)
        {
            this.Name = name;
            this.Age = age;
        }
        //我是析构函数，结束时运行
        ~Students()
        {
            Console.WriteLine("我是析构函数");
        }

        private string _name;
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }
        private int _age;
        public int Age
        {
            get { return _age; }
            set
            {
                if (value <  || value > )
                {
                    value = ;
                } _age = value;
            }
        }
        private char _gender;
        public char Gender
        {
            get {
                if (_gender != '男' && _gender != '女')
                {
                _gender='男';
                }
                return _gender;
            }
            set { _gender = value; }
        }
        private int _chinese;
        public int Chinese
        {
            get { return _chinese; }
            set { _chinese = value; }
        }
        private int _math;
        public int Math
        {
            get { return _math; }
            set { _math = value; }
        }
        private int _english;
        public int Englist
        {
            get { return _english; }
            set { _english = value; }
        }
        public void SayHello()
        {
            Console.WriteLine("我叫{0}，我是{1}性，我今年{2}岁", this.Name, this.Gender, this.Age);
        }
        public void ShowScore()
        {
            Console.WriteLine("我叫{0},我的总成绩是{1},我的平均成绩是{2}", this.Name, this.Chinese + this.Math + this.Englist, (this.Chinese + this.Math + this.Englist) / );
        }