title: Using AsyncCallback in Powershell
body: <p>I have to call a method on .NET object which is defined as</p>
  
  <blockquote>
    <p>IAsyncResult BeginListMetrics(    ListMetricsRequest listMetricsRequest,
        AsyncCallback callback,     Object state )</p>
  </blockquote>
  
  <p>Is it possible to use a powershell function as a AsyncCallback delegate? How?</p>