private static void AddUrlPrefixes(ISharedConfiguration configuration, ref UrlPrefixCollection urlPrefixesColl) { string urlPrefixesValue = configuration.GetValue("Hosting:urlPrefixes"); if (urlPrefixesValue != null) { string[] prefixsValues = urlPrefixesValue.Split(" "); foreach (string prefix in prefixsValues) { urlPrefixesColl.Add(prefix); } } }