public AppConfigRunnerSettings()
        {
            var configuration = new Formo.Configuration("fizzBuzzPairs");

            var pairs = configuration.BindPairs<Replacement, int, string>(x => x.Key, x => x.Value);

            replacements = pairs
                    .Select(x => new Replacement { Key = x.Key, Value = x.Value })
                    .ToDictionary(x => x.Key);
        }