ServiceStack.UrlExtensions.FindMostSpecificRoute C# (CSharp) Метод

        private static RouteResolutionResult FindMostSpecificRoute(IEnumerable<RouteResolutionResult> routes)
        {
            RouteResolutionResult bestMatch = default(RouteResolutionResult);
            var otherMatches = new List<RouteResolutionResult>();

            foreach (var route in routes)
            {
                if (bestMatch == null)
                {
                    bestMatch = route;
                    continue;
                }

                if (route.VariableCount > bestMatch.VariableCount)
                {
                    otherMatches.Clear();
                    bestMatch = route;
                    continue;
                }

                if (route.Priority < bestMatch.Priority)
                {
                    continue;
                }

                if (route.VariableCount == bestMatch.VariableCount)
                {
                    // Choose
                    //     /product-lines/{productId}/{lineNumber}
                    // over
                    //     /products/{productId}/product-lines/{lineNumber}
                    // (shortest one)
                    if (route.PathLength < bestMatch.PathLength)
                    {
                        otherMatches.Add(bestMatch);
                        bestMatch = route;
                    }
                    else
                    {
                        otherMatches.Add(route);
                    }
                }
            }

            // We may find several different routes {code}/{id} and {code}/{name} having the same number of variables. 
            // Such case will be handled by the next check.
            return bestMatch == null || otherMatches.All(r => r.HasSameVariables(bestMatch))
                ? bestMatch
                : null;
        }