title: RX getting a IObservable<List<T>> to an IObservable<T>
body: <p>I'm pretty new to RX and cannot figure this out.</p>
  
  <p>I have an <code>IObservable&lt;List&lt;T&gt;&gt;</code> where <code>List&lt;T&gt;</code> is guaranteed to have one element.</p>
  
  <p>How do I convert this to an <code>IObservable&lt;T&gt;</code>.</p>
  
  <p>I thought it would have something to do with <code>Single</code> but that is listed as obsolete, and also doesn't return an <code>IObservable&lt;T&gt;</code> anyway (as pretty sure it would return the <code>Single</code> <code>List&lt;T&gt;</code> element.</p>
  
  <p>Is there some <code>SelectMany</code> magic I can do here?</p>