mattbarrett

        public static IObservable<TResult> WithLatestFrom<TFirst, TSecond, TResult>(this IObservable<TFirst> first, IObservable<TSecond> second, Func<TFirst, TSecond, TResult> resultSelector)
        {
            if (first == null)
                throw new ArgumentNullException("first");
            if (second == null)
                throw new ArgumentNullException("second");
            if (resultSelector == null)
                throw new ArgumentNullException("resultSelector");

            return first.Publish(f =>