<li>The message is clearer when the assertion fails </li> </ul>  <p>Basically, AssertSequenceEqual does what you&#39;d expect it to - it checks that the actual result (usually expressed as the variable you call the method on) matches the expected result (usually expressed as a parameter array).</p>  <p>So far, so good. Now let&#39;s check argument validation:</p>  <div class="code">[Test]    <br /><span class="Modifier">public</span>&#160;<span class="ValueType">void</span> NullSourceThrowsNullArgumentExcep