How to convert from IObservable <a> to IObservable <b>

Question

Do I have a method that returns an interface IObservable<A>(in silverlight) and wants to convert it to another IObservable<B>?

So what do I need instead of "CONVERT_SOME_HOW"

public IObservable<Bar> Get(IEnumerable<object> @params)
{

    IObservable<Foo> fooObservable = _resources.Get(@params);
    IObservable<Bar> barObservable = CONVERT_SOME_HOW(fooObservable);

    return barObservable;
}

Answer 1

As with LINQ to Objects, use the projection:

var observableB = observableA.Select(a => new B(a));

(Obviously, adjust according to your conversion.)

Assuming that I understood the question correctly. It is not clear what you mean by "when the subscription to the first observer is completed."

Answer 2

, , A B, Select.

, , A IObservable<B>, SelectMany:

var observableB = observableA.SelectMany(a => GetObservableB(a));