using System;

public class Program

{

    public static void Main()

    {

        var ct1 = new ClassTest();

        var ct2 = new ClassTest();

        ITest ict1 = ct1;

        ITest ict2 = ct2;

        Console.WriteLine($"ref comp: {ct1 == ct2}, i comp: {ict1 == ict2},");

        var st1 = new StructTest();

        var st2 = new StructTest();

        ITest ist1 = st1;

        ITest ist2 = st2;

        Console.WriteLine($"val comp: {st1.Equals(st2)}, i comp: {ist1 == ist2},");

    }

}

​

interface ITest {}

​

struct StructTest : ITest {}

​

class ClassTest : ITest {}