C# 5.0 async/await feature and Rx - Reactive Extensions

Question

I am wondering what do the new C# 5.0 asynchronous features mean for Rx - Reactive Extensions? It seems to be not a replacement but they seem to overlap - Task and IObservable .

Answer 1

Check also: TPL Dataflow Overview about TDF and Rx:

Astute readers may notice some similarities between TPL Dataflow and Reactive Extensions (Rx), currently available as a download from the DevLabs prototypes site. Rx is predominantly focused on coordination and composition of event streams with a LINQ-based API, providing a rich set of combinators for manipulating IObservables of data. In contrast, TPL Dataflow is focused on providing building blocks for message passing and parallelizing CPU- and I/O-intensive applications with high-throughput and low-latency, while also providing developers explicit control over how data is buffered and moves about the system. As such, Rx and TPL Dataflow, while potentially viewed as similar at a 30,000 foot level, address distinct needs. Even so, TPL Dataflow and Rx provide a better together story.

Answer 2

Jeff在Rx论坛上写道，Rx仍将用于协调多个事件驱动的任务，Rx发布了一个包含IAsyncEnumerable的新版本，以便在Rx中使用新的异步功能。