using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

​

​

public class TestClass

{

    private int x;

​

    public static bool operator ==(TestClass a, TestClass b)

    {

        return a.x == b.x;

    }

​

    public static bool operator !=(TestClass a, TestClass b)

    {

        return !(a == b);

    }

}