using System;

public abstract class Option
{
private readonly String _id;
public const Option Null = null;
public static Boolean operator !=(Option option, String optionId)
{
return !(option == optionId);
}
public static Boolean operator ==(Option option, String optionId)
{
return true;
}

public static Boolean operator !=(Option option1, Option option2)
{
return !(option1 == option2);
}
public static Boolean operator ==(Option option1, Option option2)
{
return !(option1 == option2);
}
}

public class C
{
private Option option;

public void B()
{
if (option != Option.Null) {}
}
}

Issue was closed