private static CorsRule CreateCorsRule(ApplicationCorsRule rule)
 {
     return new CorsRule
     {
         AllowedHeaders = new List<string>(rule.AllowedHeaders.Split(',')),
         AllowedMethods = GetCorsMethods(rule.AllowedVerbs),
         AllowedOrigins = new List<string>(rule.AllowedOrigins.Split(',')),
         ExposedHeaders = new List<string>(rule.ExposedHeaders.Split(',')),
         MaxAgeInSeconds = rule.MaxAgeSeconds
     };
 }