TNX.Reactive (nuget): [.NET 4.6.1+]  - DisposableObservable: a class for creating Observable sequences with TPL easily as Observable.Create - [IObservable].Serialize: wrap all subscriptions into a single ISubject against the sourcing observable - [IObservable].AsAsync: execute all functions on TPL - [IObservable].Fork: add another subscription to the observable creating a new child observable stream - [IObservable].Where(filter, elseObservable): apply the where in the usual way, and generate an Else observable to continue work in the other case - [IObservable].ToJson: serialize in Json all values - [IObservable].ToCSV: serialize in CSV columns all values (configurable delimiter) - [IObservable].OnLastOrDefault: do something when observable completes  - ObservableStreamReader: route binary data from a Stream to subscribers
Keywords: reactive|programming|sequence|stream|tcp|listener|network|where|else|TPL|Task|Parallel|async|await|threading