title: how to get indication of "success" from removeall
body: <p>i want to know if my function did remove from my list or not here is my code:</p>
  
  <pre><code>       public int RemovePassenger(string name)
      {
  
           Passengers.RemoveAll(x =&gt; x.PassengerName == name);
          return //if the passenger actually been remove or not 
  
      }
  </code></pre>