Comments

I have also some problems:

• I can't really debug Unit tests when using Silverlight Reactive Extensions (Silverlight Rx library with .NET core test cases).
• One case when calling .Subscribe() I get an exception before onNext evaluation: "Collection was modified; enumeration operation may not execute." But I don't know which collection! How can this be possible, I thought that Observables are like "history of events", and you can't modify history... Because this is before the first onNext, I don't find a way to debug.

And questions:

• Ain't there pdb-files to debug the Rx core...?
• Should I dispose manually? When?
• How will Rx work with Silverlight two-way data binding?

This video was so clear and inspiring that our team took Rx into real world use. We have used it a few weeks now, and it have already a) made a few complex source code classes (with async events) a lot simpler, and b) solved some really nasty thread safety issues. So, thanks Bart and the Rx team!

The "Task vs IObservable" is like the "Nullable vs IEnumerable" (when we have Enumerable.Empty).