title: Convert IAsyncEnumerable to List
body: <p>So in C#8 we got the addition of the <code>IAsyncEnumerable</code> interface. </p>
  
  <p>If we have a normal <code>IEnumerable</code> we can make a <code>List</code> or pretty much any other collection we want out of it. Thanks to Linq there.</p>
  
  <pre class="lang-cs prettyprint-override"><code>var range = Enumerable.Range(0, 100);
  var list = range.ToList();
  </code></pre>
  
  <p>Well now I want to convert my <code>IAsyncEnumerable</code> to a <code>List</code> and this of course asynchronously. Are there already Linq implementations for that case? If there isn't, how could I convert it myself then?</p>