C#重寫Equals和GetHashCodeC#基礎學習

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

namespace day01
{
    class Class31
    {
        static void Main(string[] args)
        {
            Student stu1 = new Student("zhangsan", 23);
            Student stu2 = new Student("zhangsan", 23);
            Console.WriteLine(stu1.Equals(stu2));
            Console.ReadKey();
        }
    }
    public class Student
    {
        private string name;
        private int age;
        public string Name { get; set; }
        public int Age { get; set; }
        public Student(string name,int age)
        {
            Name = name;
            Age = age;
        }
        public override string ToString()
        {
            return "name: " + Name + " age: " + Age;
        }
        //public override bool Equals(object obj)
        //{
        //    if(obj == null)
        //    {
        //        return false;
        //    }
        //    if(obj.GetType() == typeof(Student))
        //    {
        //        Student stu = (Student)obj;
        //        if(stu.Name.Equals(this.Name) && stu.Age == this.Age)
        //        {
        //            return true;
        //        }
        //        else
        //        {
        //            return false;
        //        }
        //    }
        //    else
        //    {
        //        拋出異常
        //        throw new ArgumentException("類型轉換異常");
        //    }
        //}
        public override bool Equals(object obj)
        {
            if(obj == null)
            {
                return false;
            }
            if(obj is Student)
            {
                Student stu = obj as Student;
                if(stu.Name.Equals(this.Name) && stu.Age == this.Age)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            else
            {
                throw new ArgumentException("類型轉換異常");
            }

        }
        //如何重寫GetHashCode()方法
        //先放着
        public override int GetHashCode()
        {
            return base.GetHashCode();
        }
    }
}