How to avoid the use of Subjects in RX

Question

So I keep reading everywhere that use of Subject is \"bad\" - and I kind of agree with the reasoning.

However, I am trying to think of the best way

Answer 1

A simple way to enter the observable is via an Action

private Action _action;

Create the observable

public IObservable GetObservable()
{
    return Observable.FromEvent>(
                ev => _action += ev, 
                ev => _action -= ev);
}

Then add to the observable using

public void OnNext(ObservableArgs args)
{
    _action?.Invoke(args);
}