FubuMVC.Core.Registration.Querying.ChainResolutionCache.find C# (CSharp) Method

        private Func<BehaviorChain> find(ChainSearch search)
        {
            var candidates = search.FindCandidates(_behaviorGraph);

            var count = candidates.Count();
            switch (count)
            {
                case 1:
                    var chain = candidates.Single();
                    return () => chain;

                case 0:
                    return () =>
                    {
                        if (!search.Required)
                        {
                            return null;
                        }
                        throw new FubuException(2104, "No behavior chains are registered matching criteria:  " + search);
                    };

                default:
                    var message = "More than one behavior chain matching criteria:  " + search;
                    message += "\nMatches:";

                    candidates.Each(x =>
                    {
                        message += "\n" + x;
                    });

                    return () =>
                    {
                        throw new FubuException(2108, message);
                    };
            }
        }