Question

Observable.FromAsyncPattern can be used to make an observable from BeginX EndX style async methods.

Maybe I’m misunderstanding things, but is there a similar function to create an observable from the new async style methods – ie.. Stream.ReadAsync?

Answer 1

You can create an IObservable<T> from a Task<T> using ToObservable:

using System.Reactive.Threading.Tasks;

Stream s = ...;
IObservable<int> o = s.ReadAsync(buffer, offset, count).ToObservable();