Here is an example of anomaly detection with ML.NET its not online learning based however. https://blogs.msdn.microsoft.com/dotnet/2018/11/08/announcing-ml-net

Here is an example of anomaly detection with ML.NET its not online learning based however. https://blogs.msdn.microsoft.com/dotnet/2018/11/08/announcing-ml-net-0-7-machine-learning-net/#enabled-anomaly-detection-scenarios-and-detecting-unusual-events https://blogs.msdn.microsoft.com/dotnet/2018/11/08/announcin...