public class DialogRequirementIsOptionValid : BaseDialogRequirement
{
    public override bool CheckRequirement(EntityPlayer player, EntityNPC talkingTo)
    {
        string[] array = Value.Split(new char[]
        {
            ','
        });

        return RebirthUtilities.IsOptionAvailable(array[0], array[1], array[2]);
    }
}

public class DialogRequirementNotIsOptionValid : BaseDialogRequirement
{
    public override bool CheckRequirement(EntityPlayer player, EntityNPC talkingTo)
    {
        string[] array = Value.Split(new char[]
        {
            ','
        });

        //Log.Out("DialogRequirementNotIsOptionValid-CheckRequirement array[0]: " + array[0]);
        //Log.Out("DialogRequirementNotIsOptionValid-CheckRequirement array[1]: " + array[1]);
        //Log.Out("DialogRequirementNotIsOptionValid-CheckRequirement array[2]: " + array[2]);

        bool result = !RebirthUtilities.IsOptionAvailable(array[0], array[1], array[2]);

        //Log.Out("DialogRequirementNotIsOptionValid-CheckRequirement result: " + result);

        return result;
    }
}