using System;

​

public class Program

{

    public static void Main()

    {

        var obj = new MyType();

        Console.WriteLine($"obj == null: " + (obj == null));

        Console.WriteLine($"obj is null: " + (obj is null));

    }

    public class MyType {

        public static bool operator== (MyType a, MyType b) => true;

        public static bool operator!= (MyType a, MyType b) => false;

        public override bool Equals(object other) => other is MyType;

        public override int GetHashCode() => 0;

    }

}