Yes Or No

YesOrNo.cs

class YesOrNo<TState>
{
    private readonly TState state;
    private readonly bool keepGoing;

    public bool Success { get { return keepGoing; } }

    public YesOrNo(TState state = default (TState), bool keepGoing = true)
    {
        this.state = state;
        this.keepGoing = keepGoing;
    }

    public YesOrNo<TState> Question(string question, Func<TState, TState> onYes, Action<TState> onNo)
    {
        if (keepGoing)
        {
            Console.Write(question + " ");
            var key = Console.ReadKey();
            if (key.KeyChar.ToString().ToLower() == "y")
            {
                Console.WriteLine();
                var newState = onYes(state);
                return new YesOrNo<TState>(newState);
            }
            Console.WriteLine();
            onNo(state);
            return new YesOrNo<TState>(state, false);
        }
        return new YesOrNo<TState>(state, false);
    }
}