If you find a bot/spider/crawler user agent that NetCrawlerDetect fails to detect, please submit a pull request with the regex pattern added to the _data List in Fixtures/Crawlers.cs and add the failing user agent to NetCrawlerDetect.Tests/crawlers.txt.
Please also consider submitting a pull request to our parent project (https://github.com/JayBizzle/Crawler-Detect). :)