title: What would be an equivalent of Nunit's Assert.That in Xunit?
body: <p>I know how to write this using Nunit, </p>
  
  <pre><code>Assert.That(exception, Is.InstanceOfType(typeof(TypeNotRegisteredException)));
  </code></pre>
  
  <p>How can I write the same thing using in Xunit, as Xunit does not have <code>Assert.That</code>.</p>