using System;

​

public class MyClass 

{ 

    public int Id { get; set; }

    public string Name { get; set; }

}

​

public record Student (int Id, string Name);

​

public class Program

{

    public static void Main()

    {

        MyClass obj1 = new() { Id=1, Name="Mike" };

        MyClass obj2 = new() { Id=1, Name="Mike" };

        Console.WriteLine($"兩物件是否相等: {obj1.Equals(obj2)}");

​

        Student stu1 = new (1, "Mike");

        Student stu2 = new (1, "Mike");

        Console.WriteLine($"兩物件是否相等: {stu1.Equals(stu2)}");

        // 跟 EqualityContract 有關的實驗。

        Console.WriteLine($"stu1 是否等於 obj1: {stu1.Equals(obj1)}");  

        // 如果兩個 record 物件的內容完全相同，其 hash code 必然也相同。

        Console.WriteLine($"stu1 hash: {stu1.GetHashCode()}");  

        Console.WriteLine($"stu2 hash: {stu2.GetHashCode()}");  

    }

}

​

​